Consulta: creatorFacets:"Soest, R.W.M. van"
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Data/hora: 14/06/2024 02:11:08

A Bibliography of Pelagic Tunicates
Provedor de dados: 16
Autores: Waard-Pouw, G. van; Soest, R.W.M. van.
The present bibliography on pelagic Tunicates has been compiled over a period of 4 years, mainly by the first author. It is meant, not as an official publication, but as a working aid for students of pelagic Tunicates. It comprises about 1300-1400 different titles of books and articles. For obvious reasons the mere listing of all those titles in alphabetical order would be impractical for specialized demands. Splitting this list in as many subheadings as possible in a way like the Zoological Record would be ideal. However, many articles and books are difficult to place under one heading; the same titles would have to be mentioned under a number of different headings. With as many headings as possible this would mean a multiplication of the 1300-1400 titles...
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/506352

Haliclona (Halichoclona) vanderlandi spec. nov. (Porifera: Demospongiae: Haplosclerida) from Indonesia
Provedor de dados: 16
Autores: Weerdt, W.H. de; Soest, R.W.M. van.
A new sponge species, Haliclona (Halichoclona) vanderlandi is described from three Indonesian localities: Take Bone Rata, Kapoposang (SW Sulawesi) and Manadotua Island (NE Sulawesi). The species belongs to the family Chalinidae and is assigned to the subgenus Halichoclona of the genus Haliclona, hitherto known as the “fistulosa” group as distinguished by de Weerdt (1989).
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Haplosclerida; Indonesia; New species; Haliclona; Halichoclona; 42.72.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/219454

A revision of the megacanthoxea-bearing tetillids (Porifera, Spirophorida), with a description of a new species
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A sponge collection dredged by Dr. P. WAGENAAR HUMMELINCK in the vicinity of Barbados (West Indies) contained a Cinachyralike specimen bearing large and conspicuous acanthoxea. This find induced the present author to re-examine all specimens with similar spiculation reported so far. A review of the literature revealed that a total of three such specimens has been described in two different genera, all as separate species, viz. Acanthotetilla hemisphaerica Burton, 1959, Acanthocinachyra enigmatica Levi, 1964, and Acanthocinachyra seychellensis Thomas, 1973. Both genera are reported to differ in the presence (genus Acanthocinachyra) or absence (genus Acanthotetilla) of sigmaspire microscleres. In view of the close similarity of the two genera it seemed wise...
Tipo: Article / Letter to the editor
Ano: 1977
URL: http://www.repository.naturalis.nl/record/506047

Phylogenetic classification of the halichondrids (Porifera, Demospongiae)
Provedor de dados: 16
Autores: Soest, R.W.M. van; Díaz, Maria Cristina; Pomponi, Shirley A.
Using a multicharacter approach and numerical cladistic computer programs a phylogenetic analysis is made of a newly defined order Halichondrida (which includes all Halichondrida and parts of the Axinellida sensu Lévi, 1973), with emphasis on the newly defined family Halichondriidae (which includes the families Halichondriidae and Hymeniacidonidae sensu Lévi, 1973, and some genera formerly assigned to the Axinellidae and Desmoxyidae). The newly defined order consists of the “old” families Axinellidae/Bubaridae and Desmoxyidae, a “new” family Dictyonellidae (containing Dictyonella, Acanthella, Liosina and Dactylella), and the new concept of the family Halichondriidae. On the basis of numerous specimens, including many type and other original material from...
Tipo: Article / Letter to the editor
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504929

Taxonomy of the subfamily Cyclosalpinae Yount, 1954 (Tunicata, Thaliacea), with descriptions of two new species
Provedor de dados: 16
Autores: Soest, R.W.M. van.
The genera Cyclosalpa de Blainville, 1827 and Helicosalpa Todaro, 1902 are revised on the basis of material from all three oceans. Two new species, Cyclosalpa foxtoni and Cyclosalpa ihlei are described, and four taxa, formerly described as varieties or subspecies, are raised to specific rank. The existence of morphological groups of species within the genus Cyclosalpa is discussed.
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/505108

Indonesian sponges of the genus Petrosia Vosmaer (Demospongiae: Haplosclerida)
Provedor de dados: 16
Autores: Voogd, N.J. de; Soest, R.W.M. van.
Sponges of the genus Petrosia (Demospongiae: Haplosclerida) are large and characteristic components of many Indonesian reefs. We identify and provide descriptions of seven species of Petrosia collected recently on SW Sulawesi reefs (Eastern Indonesia), two of which are new to science: Petrosia (Petrosia) alfiani spec. nov. and Petrosia (Petrosia) hoeksemai spec. nov. Additional species recorded are Petrosia (Petrosia) lignosa Wilson, 1925, Petrosia (Petrosia) nigricans Lindgren, 1897, Petrosia (Petrosia) plana Wilson, 1925, Petrosia (Strongylophora) corticata (Wilson, 1925) and Petrosia (Strongylophora) strongylata Thiele, 1903. The species are discussed and compared with Petrosia records from other Indonesian and neighbouring Indo-West Pacific areas. We...
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Haplosclerida; Petrosia (Petrosia); Petrosia (Strongylophora); Sulawesi; Eastern Indonesia; 42.72.
Ano: 2002
URL: http://www.repository.naturalis.nl/record/217474

Barbabos Deep-Water Sponges
Provedor de dados: 16
Autores: Soest, R.W.M. van; Stentoft, N.
Deep-water sponges dredged up in two locations off the west coast of Barbados are systematically described. A total of 69 species is recorded, among which 16 are new to science, viz. Pachymatisma geodiformis, Asteropus syringiferus, Cinachyra arenosa, Theonella atlantica. Corallistes paratypus, Corallistes tubulatus, Scleritoderma cyanea, Spongosorites silquariae, ?Halichondria ruetzleri, Leucophloeus lewisi, Acanthella vaceleti, Bubaris flagelliformis, Biemna oxeata, Phlyctaenopora halichondrioides, Echinochalina melana, Strongylophora stoneae. Of each species illustrations of the habit and/or the skeletal architecture and spiculation are provided. A review of West Indian deep water sponges is given in the form of tables of records of deep water sponges...
Tipo: Article / Letter to the editor
Ano: 1988
URL: http://www.repository.naturalis.nl/record/506087

Amsterdam Expeditions to the West Indian Islands, Report 13. Marine sponges from an island cave on San Salvador Island, Bahamas
Provedor de dados: 16
Autores: Soest, R.W.M. van; Sass, Daniel B.
Dixon Hill Lighthouse Cave, about 800 m (0.5 miles) inshore on San Salvador Island, Bahamas, was found to hold populations of three sponge species new to science, viz. Pellina penicilliformis n. sp., Prosuberites geracei n. sp., and Cinachyra subterranea n. sp. The new species are described and figured, and compared with Caribbean congeneric species. The geological history of the cave is described and its implication for ideas on speciation rates in sponges is discussed.
Tipo: Article / Letter to the editor
Ano: 1981
URL: http://www.repository.naturalis.nl/record/504363

Planktonic coelenterates collected in the North Atlantic Ocean
Provedor de dados: 16
Autores: Soest, R.W.M. van.
This short faunistic note contains a report on the species of Scyphozoa, Hydromedusae, Siphonophora and Ctenophora that were collected by OWS “Cirrus” and “Cumulus”, R.V. “Tridens” and HMS “Snellius” in the North Atlantic Ocean between 22° N and 66° N. In all, 61 species have been captured. New records for Calycopsis typa Fewkes, 1882, Cunina duplicata Maas, 1893, Sibogita geometrica Maas, 1905 ssp. occidentalis Kramp, 1959, Apolemia uvaria (Lesueur, 1811), Thalassophyes crystallina Moser, 1925 and Crystallophyes amygdalina Moser, 1925, are given.
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/504408

A new species of Biemna (Porifera, Poecilosclerida) from the Sultanate of Oman
Provedor de dados: 16
Autores: Soest, R.W.M. van; Beglinger, E.J.
Recent (1998) collecting off the coasts of Oman in the course of the EC-MAS3 funded ‘Symbiosponge’ project yielded three species of the genus Biemna Gray, 1867 (Demospongiae, Poecilosclerida, Mycalina, Desmacellidae) not previously known from the area. One of these appeared to be new to science and is described as Biemna omanensis n.sp.. Its distinguishing features comprise the possession of oxea megascleres, which is of rare occurrence in Biemna, and a full complement of microscleres including microxeas, sigmas, commata, all of which are divisible in two non-overlapping size categories, and raphides. One of the other two species conformed to an earlier described species Biemna ciocalyptoides Burton, 1959, which was discovered to be a junior synonym of...
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Oman; Biemna; New species.
Ano: 2002
URL: http://www.repository.naturalis.nl/record/505076

Catalogue of the Duchassaing &amp; Michelotti (1864) collection of West Indian Sponges (Porifera)
Provedor de dados: 16
Autores: Soest, R.W.M. van; Stone, S.M.; Boury-Esnault, N.; Rützler, K.
A list is provided in which extant and lost specimens of the Duchassaing and Michelotti collection of West Indian Sponges (published 1864) are discussed. The numerous types and other specimens are housed in two institutions, viz. the Museo e Istituto di Zoologia Sistemática dell’Universitá di Torino, Italy, and the Zoölogisch Museum Amsterdam; fragments of the Torino specimens are kept in the British Museum (Natural History), London, the National Museum of Natural History, Washington, and the Muséum National d’Histoire Naturelle, Paris. Of all extant specimens and fragments the whereabouts, collection numbers, references to recent redescriptions and the identity in modern context are given. With a few exceptions, species and genera not represented by...
Tipo: Article / Letter to the editor
Ano: 1983
URL: http://www.repository.naturalis.nl/record/505563

First European record of Haliclona loosanoffi Hartman, 1958 (Porifera, Haplosclerida), a species hitherto known only from the New England coast (U.S.A.)
Provedor de dados: 16
Autores: Soest, R.W.M. van.
An encrusting gemmuliferous haliclonid species is described from the Oosterschelde (S.W.- part of the Netherlands), which is demonstrated to be conspecific with Haliclona loosanoffi Hartman, 1958. This species was hitherto only known from the New England coast (U.S.A.). The species is compared with other encrusting haliclonids occurring in Western Europe.
Tipo: Article / Letter to the editor
Ano: 1976
URL: http://www.repository.naturalis.nl/record/504950

Didiscus verdensis spec. nov. (Porifera: Halichondrida) from the Cape Verde Islands, with a revision and phylogenetic classification of the genus Didiscus
Provedor de dados: 16
Autores: Hiemstra, F.; Soest, R.W.M. van.
A new species of the circumtropical/subtropical genus Didiscus Dendy, 1922 is described from the Cape Verde Islands. Based on a phylogenetic analysis of all known species of the genus, using morphological and microscopical (including SEM) characters, it was demonstrated that the new species is closest to the eastern Mediterranean D. styliferus Tsurnamal, 1968.
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Halichondrida; Didiscus; Cape Verde Islands; 42.72.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/319106

A catalogue of the Coelenterate type specimens of the Zoological Museum of Amsterdam. III. Antipatharia, Pennatulacea, Stolonifera, Telestacea, Alcyonacea
Provedor de dados: 16
Autores: Soest, R.W.M. van.
This third part of the Coelenterate type catalogue of the Zoological Museum lists 124 nominal types (27 Antipatharia, 30 Pennatulacea, 4 Stolonifera, 3 Telestacea and 60 Alcyonacea). Seventeen not previously depicted types are represented by photographic illustrations of their habit.
Tipo: Article / Letter to the editor
Ano: 1977
URL: http://www.repository.naturalis.nl/record/505025

Affinities of the family Sollasellidae (Porifera, Demospongiae). II. Molecular evidence
Provedor de dados: 16
Autores: Erpenbeck, D.; Hooper, J.N.A.; List-Armitage, S.E.; Degnan, B.M.; Wörheide, G.; Soest, R.W.M. van.
This is the second part of a revision and re-classification of the demosponge family Sollasellidae, and an example of a successful use of combined morphological and molecular data. Sollasella had been a poorly known, long forgotten taxon, placed incertae sedis in the order Hadromerida in the last major revision of the demosponges. It has recently been suggested to belong to Raspailiidae in the order Poecilosclerida due to striking morphological similarities. The present analysis verified this re-classification using molecular markers. Comparing 28S rDNA fragments of Sollasella cervicornis, a newly described species S. moretonensis and a representative set of raspailiid and hadromerid samples. In our analyses Sollasella clearly clusters inside the...
Tipo: Article / Letter to the editor
Palavras-chave: Sponges; Classification; Raspailiidae; Sollasella; Raspailopsis; 28S rDNA; Molecular systematics; 42.72.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/226474

Hemiasterella aristoteliana n. sp. (Porifera, Hadromerida) from the Aegean Sea with a discussion on the family Hemiasterellidae
Provedor de dados: 16
Autores: Voultsiadou-Koukoura, Eleni; Soest, R.W.M. van.
A representative of the genus Hemiasterella Carter, 1879 was found for the first time in the Mediterranean Sea during sampling in the shallow waters of the northern Aegean Sea. The new species, H. aristoteliana, is compared with Atlantic Hemiasterella elongata Topsent, 1928. The status of the family Hemiasterellidae is discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Taxonomy; Hemiasterella; Hadromerida; Mediterranean.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/504475

A new Agelas (Demospongiae: Agelasida: Agelasidae) from the Thousands Islands, West-Java, Indonesia
Provedor de dados: 16
Autores: Voogd, N.J. de; Parra-Velandia, F.J.; Soest, R.W.M. van.
Agelas linnaei spec.nov. (Porifera: Demospongiae: Agelasida: Agelasidae) is described from the Thousands Islands reef complex, West- Java, Indonesia. The new species is compared with all other Agelas species occurring in the Indo-West Pacific region. The new species differs from these other species by the overall morphology and the size of the verticillated acanthostyles. Surprisingly, this is only the second Agelas species ever described from Indonesia.
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Demospongiae; Agelasida; Agelasidae; Agelas; New species; Java; Indonesia; 42.72.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/261784

Tetractinellid and hadromerid sponges of the Sultanate of Oman
Provedor de dados: 16
Autores: Soest, R.W.M. van; Beglinger, E.J.
The Sultanate of Oman harbours rich populations of sponges, especially in the four coral reef areas (Musandam Peninsula, Muscat coast &amp; Daymaniyat islands, coasts of Masirah Island, and the Khuriya Muriya Islands). Up till now, apart from a few incidental samples, the sponges of Oman were known only from five dredge stations made by the John Murray Expedition 1933-1934 off the south coasts of Oman, near the Khuriya Muriya Islands, between 13.5 and 1415 m. Descriptions of the sponges obtained in these dredges were published by Burton (1959) and the specimens are deposited in the collections of the Natural History Museum, London. To complement these dredge samples, we recently obtained samples collected by SCUBA and shore collecting, mostly from the...
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; New species; Checklist; Oman; Gulf of Arabia; 42.72.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/292120

The layered structure of bones of birds as a possible indication of age
Provedor de dados: 16
Autores: Soest, R.W.M. van; Utrecht, W.L. van.
A method of age determination, new in birds, is described. The method has been derived from similar methods commonly used to determine age of fishes, amphibians, reptilians, and mammals. It consists of demonstrating, by preparation of transverse transparent sections, the presence of annual deposits in the periosteal zone (= zone of outer circumferential lamellae) of bone. Evidence is presented that the layered structures in the periosteal zone are indeed annual and thus related with age.
Tipo: Article / Letter to the editor
Ano: 1971
URL: http://www.repository.naturalis.nl/record/504524

Monanchora stocki n. sp. (Porifera, Poecilosclerida) from the Mid-Atlantic islands
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A new species of the tropical-subtropical genus Monanchora Carter, 1883, is reported from São Tiago (Cape Verde Islands) and Ascension Island. The new species, M. stocki n. sp., is compared with related Atlantic and Indo-Pacific species, viz. Caribbean M. arbuscula (Duchassaing &amp; Michelotti, 1864) (senior synonym of Echinostylinos unguiferus De Laubenfels, 1953, and Monanchora barbadensis Hechtel, 1969), and Indo-Pacific M. unguiculata (Dendy, 1922). The new species stands out among Monanchora species by the longer and more pointed teeth of its spatulate-unguiferate chelae, which in extreme cases almost meet. The structure of the chelae of Monanchora species of various parts of its range are compared with that found in some other (? related) genera,...
Tipo: Article / Letter to the editor
Palavras-chave: Taxonomy; Monanchora; Poecilosclerida; Atlantic.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504657

Marine sponges from Curaçao and other Caribbean localities Part I. Keratosa
Provedor de dados: 16
Autores: Soest, R.W.M. van.
The present paper, the first one of a series on West Indian Sponges incorporated in the collections of the Zoological Museum of Amsterdam, deals with the Keratosa. A total of 33 species is described and fully illustrated. Part of the material consists of the Duchassaing &amp; Michelotti-collection housed in Amsterdam; of all the Keratosa-types of this collection a photographic illustration and an extensive redescription is given. Most of the type specimens are designated as (para-)lectotypes. Two new species are described, viz. Ircinia hummelincki from deeper water off Barbados, and Pleraplysilla stocki from mangrove forests in Puerto Rico. Five “forgotten” species are revived, viz. ? Coscinoderma musicalis (Duch. &amp; Mich., 1864), Fasciospongia...
Tipo: Article / Letter to the editor
Ano: 1978
URL: http://www.repository.naturalis.nl/record/506132

Diversity and spatial heterogeneity of mangrove associated sponges of Curaçao and Aruba
Provedor de dados: 16
Autores: Hunting, E.R.; Soest, R.W.M. van; Geest, H.G. van der; Vos, A.; Debrot, A.O.
Sponges are major epibionts of mangrove roots in the Caribbean. Mangrove sponge communities in the Caribbean mainly consist of species that are typical to this habitat and community compositions often differ from those found on coral reefs nearby. Heterogeneity in species distributions between locations and within locations between roots is often reported. This study quantifies the diversity and abundance of mangrove associated sponges in the inner bays of Curaçao and Aruba and correlates variability of regional sponge diversity with environmental variables measured along the surveyed sites. Tannin concentrations vary between mangrove roots, and were correlated to sponge cover as a possible cause for habitat heterogeneity on a smaller scale. A total of 22...
Tipo: Article / Letter to the editor
Palavras-chave: Epibionts; Heterogeneity; Mangroves; Spatial variations; Sponges; Tannins; 42.72.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/291892

Skeletons in confusion: a review of astrophorid sponges with (dicho-)calthrops as structural megascleres (Porifera, Demospongiae, Astrophorida)
Provedor de dados: 16
Autores: Soest, R.W.M. van; Beglinger, E.J.; Voogd, N.J. de.
We present a review of astrophorid species possessing calthrops megascleres as structural megascleres (including species with dichotriaene modifi cations, but excluding mesotriaene and trichotriaene bearing species). Radiating oxeas characteristic of most astrophorids are lacking in such sponges, but auxiliary oxeas are apparently present in some species. Th ese sponges are currently assigned to two families, Pachastrellidae with four nominal genera Dercitus, Stoeba, Dercitancorina, Halinastra (the latter two generally considered junior synonyms of Stoeba), and Calthropellidae with nominal genera Calthropella, Corticellopsis (usually considered a junior synonym), Pachataxa and Pachastrissa. Our review of many original specimens and extensive new material...
Tipo: Article / Letter to the editor
Palavras-chave: Sponges; Astrophorida; Pachastrellidae; Dercitus; Calthropellidae; Calthropella; Taxonomy; New species; 42.72.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/376610

New records of Xestospongia species (Haplosclerida: Petrosiidae) from the Curaçao reefs, with a description of a new species
Provedor de dados: 16
Autores: Soest, R.W.M. van; Weerdt, W.H. de.
Three species of the sponge genus Xestospongia (Haplosclerida) are newly recorded for the south Caribbean island of Curaçao, Xestospongia arenosa n. sp., X. caminata Pulitzer-Finali (1986) and X. deweerdtae Lehnert &amp; Van Soest (1999). The species are described and compared with Xestospongia species already known from Curaçao and other Caribbean localities. A key to the Curaçao species of Xestospongia is provided.
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Xestospongia; New species; New records; Curaçao.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/505045

On the moult in the Stoat, Mustela erminea Linnaeus, 1758, from the Netherlands
Provedor de dados: 16
Autores: Soest, R.W.M. van; Bree, P.J.H. van.
1. A detailed study was made of the subsequent stages in the colour change of the Stoat, Mustela erminea Linnaeus, 1758. 2. Starting and finishing date of both Autumn and Spring moult were determined, based on the examination of 300 pelts from the Netherlands. 3. An indication was found for the existence of a difference in finishing date of the Spring moult in male and female Stoats. The examinations showed that female Stoats complete their summercoat a good month earlier than males. 4. It appeared that there is a remarkable difference in number of completely white animals between warmer and colder parts in the Netherlands. The colder regions hold much more completely white animals. This indicates that temperature has an influence on whether Stoats turn...
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/504487

Phylogeography, genetic diversity and structure of the poecilosclerid sponge Phorbas fictitius at oceanic islands
Provedor de dados: 16
Autores: Xavier, J.R.; Soest, R.W.M. van; Breeuwer, J.A.J.; Martins, A.M.F.; Menken, S.B.J.
In this study we assessed the sequence variation in the I3-M11 partition of the mtDNA cytochrome c oxidase subunit I gene (COI) in ten populations of the Atlanto-Mediterranean demosponge Phorbas fictitius (Porifera: Poecilosclerida) at two spatial scales: a regional scale comparing mainland (Iberian) and insular (Macaronesian) populations, and a local (Archipelagic) scale focusing on different island populations of the Azores archipelago. A multiple approach combining diversity measures, FST estimates, phylogenetic inference and nested clade phylogeographic analysis was used to assess the genetic structure and elucidate the evolutionary history of this species. Genetic differentiation, based of FST estimates, was found among most populations at both scales...
Tipo: Article / Letter to the editor
Palavras-chave: Azores; Genetic diversity; Iberia; Macaronesia; Mitochondrial DNA; Porifera; 42.72.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/355610

Marines sponges from Curaçao and other Caribbean localities Part III. Poecilosclerida
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A total of 56 species of West Indian Poecilosclerida incorporated in the collections of the Zoological Museum of Amsterdam is described and fully illustrated. Poecilosclerid type specimens of the Duchassaing &amp; Michelotti (1864) collection housed in Amsterdam are redescribed. Next to these 29 new species are erected: Mycale arndti, M. diversisigmata, M. americana, M. magnirhaphidifera, Strongylacidon poriticola, S. viridis, S. rubra. Batzella rosea, Hemitedania baki, Lissodendoryx strongylata, Forcepia grandisigmata, Coelosphaera hechteli, Crella chelifera, Hymedesmia jamaicensis, H. palmatichelifera, H. agariciicola, H. curacaoensis, Acanthancora coralliophila, Clathria simpsoni, C. bulbotoxa, C. hymedesmioides, Rhaphidophlus minutus, R. raraechelae,...
Tipo: Article / Letter to the editor
Ano: 1984
URL: http://www.repository.naturalis.nl/record/506067

Sex and age composition of a Stoat population (Mustela erminea Linnaeus, 1758) from a coastal dune region of the Netherlands
Provedor de dados: 16
Autores: Soest, R.W.M. van; Bree, P.J.H. van.
The age composition of a sample of a Stoat population from the Netherlands was studied. Various relative age criteria were tested on their validity in separating age groups. The study of the layered cemental deposits contributed the most important part to the final conclusions. By using also the data on the sexual cycle of the Stoat, a theoretically expected age pyramid was calculated, which was compared with the actually found age composition.
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/505124

A new species in the genus Salpa Forskål, 1775 (Tunicata, Thaliacea)
Provedor de dados: 16
Autores: Soest, R.W.M. van.
Salpa younti nov. spec. is described from the Bermuda area. The new species is also reported from the South Atlantic and the Pacific. Its systematic position within the genus Salpa is discussed and general remarks are made on the taxonomic status of the known taxa of this genus.
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/504696

A catalogue of the Coelenterate type specimens of the Zoological Museum of Amsterdam. II. Benthic Hydrozoa
Provedor de dados: 16
Autores: Soest, R.W.M. van.
This second part of the Coelenterate type catalogue of the Zoological Museum of Amsterdam lists 133 nominal types of benthic Hydrozoa (112 hydroids, 21 hydrocorals).
Tipo: Article / Letter to the editor
Ano: 1976
URL: http://www.repository.naturalis.nl/record/505227

A catalogue of the Coelenterate type specimens of the Zoological Museum of Amsterdam. I. General Introduction, Pelagic Coelenterates
Provedor de dados: 16
Autores: Soest, R.W.M. van.
This paper represents the first part of a list of Coelenterate type specimens incorporated in the collections of the Zoological Museum. The present 46 pelagic Coelenterate types are listed with their original names accompanied by a non-critical and incomplete synonymy.
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/504862

A new sublithistid sponge Monanthus ciocalyptoides n.sp. (Porifera, Halichondrida), from the West Indian region
Provedor de dados: 16
Autores: Soest, R.W.M. van; Zea, S.
Monanthus ciocalyptoides n. sp. is described from two localities in the West Indian region, viz. the Saba Bank (17°25’N 63°33’W) and the Colombian Caribbean (11°20’N 74°09’W). The genus was hitherto known from South African waters only, by the type-species M. plumosus Kirkpatrick (1903). The systematic status of the new species and the genus as sublithistid members of the order Halichondrida is discussed.
Tipo: Article / Letter to the editor
Ano: 1986
URL: http://www.repository.naturalis.nl/record/505517

Sponge interactions with spatial competitors in the Spermonde Archipelago
Provedor de dados: 16
Autores: Voogd, N.J. de; Becking, L.E.; Hoeksema, B.W.; Noor, A.; Soest, R.W.M. van.
This study describes the in situ effects of four bioactive sponges on their neighbours at three different locations and two depths in the Spermonde Archipelago, SW Sulawesi, Indonesia. The natural rates of interaction between the sponge species and eight possible competitive invertebrate groups were defined and quantified in circular subplots, this was repeated 25x for each of the four species and for each location and depth. Most interactions occurred with other sponges and with corals. Coral overgrowth by the four target species caused necrosis in more than 85 % of these interactions, whereas this was less than 25 % in sponge overgrowths. These results suggest that the toxins are used in spatial competition and that the concentrations of the bioactive...
Tipo: Article / Letter to the editor
Palavras-chave: Spatial competition; Allelopathy; Sponge culture; Indonesia; 42.72.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/268614

Trochospongilla horrida, een nieuwe spons voor Nederland (Porifera: Spongillidae)
Provedor de dados: 16
Autores: Soest, R.W.M. van; Storm, B.; Swarte, M.B.A.
Trochospongilla horrida, a new sponge species for The Netherlands (Porifera: Spongillidae)   Trochospongilla horrida is recorded in the Netherlands for the first time. It was recently discovered during a survey of invertebrates of the river IJssel. A description of the sponge material is given and records of other sponges occurring along with it in the river IJssel are provided. The specimens are kept in the collections of the Zoölogisch Museum Amsterdam.
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Spongillidae; Trochospongilla horrida; Nederland; Verspreiding; Herkenning; 42.72.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/215293

Latitudinal variation in Atlantic Salpa fusiformis Cuvier, 1804 (Tunicata, Thaliacea)
Provedor de dados: 16
Autores: Soest, R.W.M. van.
The existence of clinal variation in some morphological characters of Atlantic Salpa fusiformis Cuvier, 1804, is reported. The number of muscle fibres of both aggregate and solitary individuals is subjected to a decrease from higher to lower latitudes. Size and reproduction also seem to vary according to the latitude. The results and their bearing on infraspecific salp taxonomy are provisionally discussed.
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/504974

New species of Demospongiae (Porifera) from the national park “Archipiélago de los Roques”, Venezuela
Provedor de dados: 16
Autores: Díaz, M. Cristina; Alvarez, Belinda; Soest, R.W.M. van.
Three new species of Demospongiae from coral reefs of the Archipiélago de Los Roques National Park (Venezuelan Caribbean) and Curaçao (Netherlands Antilles) are described, viz. Eurypon laughlini n. sp., Topsentia roquensis n. sp., and Epipolasis reiswigi n. sp. The new species and the genera to which they have been assigned are discussed, as a result of which the genus Fasubera De Laubenfels, 1936, is synonymized with Eurypon Gray, 1867, and the genus Epipolasis is redefined based on characters of its typespecies. Extensive ecological data are provided for each species.
Tipo: Article / Letter to the editor
Ano: 1987
URL: http://www.repository.naturalis.nl/record/503942

Observations on taxonomy and distribution of some Salps (Tunicata, Thaliacea), with descriptions of three new species
Provedor de dados: 16
Autores: Soest, R.W.M. van.
The Salp genera Traustedtia Metcalf, 1918, Weelia Yount, 1954 and Brooksia Metcalf, 1918 are revised, resulting in the conclusion that Traustedtia is a monotypical genus, and that Brooksia on the other hand, contains two taxa, one of which is newly described under the name B. berneri. Weelia shows a confusing variation, which must await further study. The variation in Ihlea punctata (Forskål, 1775) shows that there is no ground for the assumption that the species described as Ihlea asymmetrica (Fowler, 1896) is separate from I. punctata. Two undescribed taxa, reported upon in previous studies of the present author, are now fully described as new species: Cyclosalpa danae and Thalia rhinoceros.
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/505235

The genus Thalia Blumenbach, 1798 (Tunicata, Thaliacea), with descriptions of two new species
Provedor de dados: 16
Autores: Soest, R.W.M. van.
Investigations of the marine pelagic tunicate genus Thalia Blumenbach, 1798, resulted in the description of two new species, T. cicar and T. sibogae. In addition the three known subspecies of Thalia democratica (Forskål, 1775) are considered full species. The distribution of these species, including Thalia longicauda (Quoy &amp; Gaimard, 1824), is given and a key to the solitary and aggregate zooids of the species is added. The specific status of the six taxa of the genus is discussed.
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/504926

New species of Zyzzya, Cornulella, Damiria, and Acheliderma (Porifera: Poecilosclerida), with a review of fistular genera of Iophonidae
Provedor de dados: 16
Autores: Soest, R.W.M. van; Zea, S.; Kielman, M.
New sponge species belonging to the closely related fistular genera Zyzzya, Cornulella, Damiria, and Acheliderma are described from reef habitats off the coasts of Colombia, Bonaire and Curaçao in the southern Caribbean. With very few exceptions these sponges are small to tiny specimens inhabiting crevices and other cryptic habitats; some may be excavating. For comparison both published and unpublished material belonging to these genera from other parts of the world was examined, and this yielded several nomenclatorial changes and a further three new species from the Indian Ocean. The new species are: Zyzzya invemar (Caribbean), Cornulella santamartae (Caribbean), C. tyro (Seychelles), C. amirantensis (Seychelles), Damiria leonorae (Caribbean), D. toxifera...
Tipo: Article / Letter to the editor
Palavras-chave: Caribbean coral reefs; Seychelles reefs; Sponges; Poecilosclerida; Lophonidae; Fistule growth form; Excavating growth form.
Ano: 1994
URL: http://www.repository.naturalis.nl/record/503917

Deficient Merlia normani Kirkpatrick, 1908, from the Curaçao reefs, with a discussion on the phylogenetic interpretation of sclerosponges
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A specimen of the sclerosponge Merlia lacking a basal skeleton of calcareous chambers (corresponding to the description of Merlia deficiens Vacelet, 1980) is reported from the underside of the coral Agaricia at a depth of 10 m on the reef of Curaçao, Netherlands Antilles. Its spiculation is identical to Merlia normani Kirkpatrick, 1908 specimens with the basal skeleton, from which it is concluded that M. deficiens and M. normani are probably conspecific. The phylogenetic significance of a sclerosponge with an unstable calcareous skeleton is discussed and in accordance with Vacelet (in press) it is postulated that sclerosponges are polyphyletic. It is suggested that sclerosponge skeletons are an ancestral character for a large part of the Demospongiae. The...
Tipo: Article / Letter to the editor
Ano: 1984
URL: http://www.repository.naturalis.nl/record/504574

A new sponge Desmapsamma vervoorti spec. nov. (Poecilosclerida: Desmacididae) from Indonesia
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A new poecilosclerid sponge species Desmapsamma vervoorti spec. nov. is described from several Indonesian localities: Ambon, Jedan, Salayar, Komodo, Java, and Irian Jaya. The species was earlier reported from several Indo-Pacific localities as D. anchorata (Carter, 1882), a common Caribbean shallow water species. Comparison with Caribbean specimens makes it clear that Indo-Pacific specimens demonstrate small but consistent differences.
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Indonesia; New species; Desmapsamma.; 42.72.
Ano: 1998
URL: http://www.repository.naturalis.nl/record/317752

Sponge beta diversity in the Spermonde Archipelago, SW Sulawesi, Indonesia
Provedor de dados: 16
Autores: Voogd, N.J. de; Cleary, D.F.R.; Hoeksema, B.W.; Noor, A.; Soest, R.W.M. van.
Sponge assemblages were investigated in the Spermonde Archipelago, southwestern Sulawesi, Indonesia. In this study spatial patterns of sponge similarity among sites were significantly related to remotely sensed environmental variables, the degree of human settlement and depth, but not to the distance between sites. Both oviparous and viviparous species groups responded to similar environmental constraints, and differences in similarity were unrelated to the distance between sites. The degree of human settlement, however, was significantly related to variation in the composition of viviparous, but not oviparous species. Our results demonstrate, most importantly, the utility of remotely sensed data in predicting the spatial turnover of diverse species...
Tipo: Article / Letter to the editor
Palavras-chave: Biodiversity; Indonesia; Porifera; Similarity; Spatial; 42.72.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/227743

A Checklist of the Curaçao Sponges (Porifera Demospongiae) including a pictorial key to the more common reef-forms
Provedor de dados: 16
Autores: Soest, R.W.M. van.
Although sponges are by no means unimportant organisms, in biomass and diversity, of the Curaçao coral reefs, very few scientific studies have been undertaken in this area involving sponges. To date, apart from taxonomie studies by Arndt (1927) and myself (Van Soest, 1978, 1980), only the boring sponges received attention (e.g. studies of De Groot, in progress). The main reason for this, no doubt, is the confused taxonomy of West Indian sponges. While taxonomie studies are in full progress (but are necessarily slow), it is now already possible to present sufficient data to allow certain identification of the more common reef forms by non-taxonomists for ecological or other purposes. It is one of the objects of the present paper to provide these data; they...
Tipo: Article / Letter to the editor
Ano: 1981
URL: http://www.repository.naturalis.nl/record/506324

Sponge-collecting from a drifting ice floe: the Porifera obtained in the Kara Sea by the Dutch Polar Expedition 1882-83
Provedor de dados: 16
Autores: Soest, R.W.M. van.
Tipo: Article / Letter to the editor
Palavras-chave: Arctic fauna; Carnivorous sponges; New species; Varna expedition.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/614731

Marine sponges from Curaçao and other Caribbean localities Part II. Haplosclerida
Provedor de dados: 16
Autores: Soest, R.W.M. van.
The present paper deals with the West Indian marine Haplosclerida incorporated in the collections of the Zoological Museum of Amsterdam. A total of 36 species is described and fully illustrated. Part of the material consists of the Duchassaing &amp; Michelotti collection housed in Amsterdam; of all the Haplosclerid types of this collection an extensive redescription and a photographic illustration is given. Most of the type specimens are designated (para-)lectotypes. Eight new species are erected, viz. Reniera curaçaoensis, R. carmabi, Sigmadocia piscaderaensis, Niphates alba, Xestospongia wiedenmayeri, X. portoricensis, Petrosia weinbergi, and Strongylophora hartmani. The follwing new combinations are used: Niphates amorpha (for N. digitalis forma amorpha...
Tipo: Article / Letter to the editor
Ano: 1980
URL: http://www.repository.naturalis.nl/record/506243

A revision of the genera Salpa Forskål, 1775, Pegea Savigny, 1816, and Ritteriella Metcalf, 1919 (Tunicata, Thaliacea)
Provedor de dados: 16
Autores: Soest, R.W.M. van.
Based on material from all oceans the Salp genera Salpa, Pegea and Ritteriella are revised. Particularly the study of the number of muscle fibres has shown that Salpa maxima var. tuberculata, the subspecies Pegea confoederala bicaudata and the generally synonymized species Ritteriella retracta are valid taxa, which are given the status of species. The existence of two groups of individuals differing biometrically within the species Salpa aspera and Ritteriella retracta is reported.
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/505029

Skrjabingylus nasicola (Nematoda) in skulls of Mustela erminea and Mustela nivalis (Mammalia) from the Netherlands
Provedor de dados: 16
Autores: Soest, R.W.M. van; Land, J. van der; Bree, P.J.H. van.
The occurrence of the skull parasite Skrjabingylus nasicola (Leuckart, 1842) in Stoats and Weasels from the Netherlands has been studied extensively. A redescription is given of certain morphological characters of the parasite, which includes the discovery of hitherto unknown peribuccal papillae. The genus Skrjabingylus is discussed. The extent of infection and the damage caused by the parasite in Stoats and Weasels has been assessed by studying collections of preserved skulls. Detailed comparisons are made between the infection percentages in both species of mustelids in different areas of the Netherlands and in different European countries. Also the relation between infection and age and sex has been studied. In the discussion an attempt is made to...
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/504864

North Jamaican Deep Fore-Reef Sponges
Provedor de dados: 16
Autores: Lehnert, Helmut; Soest, R.W.M. van.
An unexpectedly high amount of new species, revealed within only one hour of summarized bottom time, leads to the conclusion that the sponge fauna of the steep slopes of the deep fore-reef is still largely unknown. Four mixed gas dives at depths between 70 and 90 m, performed in May and June, 1993, at the deep fore-reef off the north Jamaican coast in front of the Discovery Bay Marine Laboratory, revealed a total of 27 demosponge species, ten of which are new to science.
Tipo: Article / Letter to the editor
Palavras-chave: Sponges; Deep-water; Fore-reef; Jamaica.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/504805

Taxonomy, phylogeny and biogeography of the marine sponge genus Acarnus (Porifera: Poecilosclerida)
Provedor de dados: 16
Autores: Soest, R.W.M. van; Hooper, J.N.A.; Hiemstra, F.
Cosmotropical species reported in the genus Acarnus, viz. A. innominatus Gray (1867), A. tortilis Topsent (1892) and A. souriei Levi (1952), are demonstrated to show small, but consistent interregional morphological differences, leading to the conclusion that these “species” are very probably complexes of closely related species derived from former widespread (Tethyan and/or Gondwanan) ancestors. On the basis of this analysis, six regional Acarnus forms are described as new species, viz. A. claudei n.sp. from South East Africa (formerly described as A. innominatus by Lévi, 1963), A. hoshinoi n.sp. from NW Australia (formerly described as A. innominatus by Hooper, 1986) A. deweerdtae n.sp. from the West Indian region (newly discovered material related to A....
Tipo: Article / Letter to the editor
Ano: 1991
URL: http://www.repository.naturalis.nl/record/504942

Protosuberites denhartogi spec. nov., a new name for European ‘Prosuberites epiphytum’ (Demospongiae, Hadromerida)
Provedor de dados: 16
Autores: Soest, R.W.M. van; Kluijver, M.J. De.
The common NE Atlantic sponge species hitherto known under the name Prosuberites epiphytum (Lamarck, 1814), is differentiated from the South Australian type and other regional specimens. Spicule size and form, although generally similar, are subtly different. Australian P. epiphytum apparently persistently overgrow the thallus of algae, possibly as part of a symbiotic association, and this is not known for European specimens. In view of these facts and taking into account the disjunct distribution, it is proposed to assign the NE Atlantic populations to a new species. The genus Prosuberites has been restricted recently to species with single long tylostyles with heads embedded in a basal spongin plate, and both P. epiphytum and the new species do not...
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Netherlands; Hadromerida; Protosuberites; 42.72.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220568

A catalogue of the Coelenterate type specimens of the Zoological Museum of Amsterdam. IV. Gorgonacea, Actiniaria, Scleractinia
Provedor de dados: 16
Autores: Soest, R.W.M. van.
This final part of the Coelenterate type catalogue lists 274 nominal types (183 Gorgonacea, 9 Actiniaria and 82 Scleractinia). Six not previously depicted types are represented by photographic illustrations of their habit. Furthermore lists are provided of schizotypes, i.e. fragments of types housed in other musea donated at some time to the Zoological Museum of Amsterdam, and of missing types, i.e. types, which should be in the ZMA but were found missing in a recent survey of the collections.
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/505117

Lissodendoryx species of the Indo-Malayan Archipelago (Demospongiae: Poecilosclerida)
Provedor de dados: 16
Autores: Hofman, Caroline C.; Soest, R.W.M. van.
A brief history of the genus Lissodendoryx Topsent, 1892 is given and the Indo-Malayan representatives are described based on material collected by the Siboga Expedition (1899-1900) and the Indonesian-Dutch Snellius II Expedition (1984-1985), on reexamination of previously described specimens from the area, and on the literature. Previously, ten species assigned to Lissodendoryx were reported from this area. Two of these, L. baculata Topsent, 1897 and L. tawiensis Wilson, 1925, do not conform to the presently employed definition of the genus Lissodendoryx. One, L. sinensis Brøndsted, 1934, is considered a junior synonym of L. ternatensis (Thiele, 1903). L. grata (Thiele, 1903) is a valid species of Lissodendoryx, with L. oxytes De Laubenfels, 1954 of the...
Tipo: Article / Letter to the editor
Palavras-chave: Sponges; Poecilosclerida; Lissodendoryx; Indo-Malayan Archipelago.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/505066

Tetrapocillon atlanticus n.sp. (Porifera, Poecilosclerida) from the Cape Verde Islands
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A representative of the rare genus Tetrapocillon Brondsted (1924) was found for the first time in the Atlantic Ocean, dredged at 70 m depth during the recent CANCAP VII Expedition to the Cape Verde Islands. The single specimen differed from the previously known Indo-Pacific specimens of the genus ( T. novaezealandiae Brondsted, 1924) in the life colour, the possession of thin strongyles (in stead of thicker styles) and the smaller size of the tetrapocilli. For these reasons and the geographic disjunction the Cape Verde specimen was assigned to a new species, T. atlanticus n.sp. The affinities of the genus Tetrapocillon and other genera, seemingly related on the basis of similarities in the microsclere complement are discussed; it is made apparent that it...
Tipo: Article / Letter to the editor
Ano: 1988
URL: http://www.repository.naturalis.nl/record/505249

Affinities of the family Sollasellidae (Porifera, Demospongiae). I. Morphological evidence
Provedor de dados: 16
Autores: Soest, R.W.M. van; Hooper, J.N.A.; Beglinger, E.; Erpenbeck, D.
Comparison of Sollasella digitata Lendenfeld, 1888, up until the present assigned to its own family Sollasellidae Lendenfeld, 1887 in the order Hadromerida, and Raspailopsis cervicornis Burton, 1959, assigned to Raspailiidae Nardo, 1833 in the order Poecilosclerida, leads to the conclusion that both should be considered congeneric and are best assigned to a single genus Sollasella. This conclusion is based on examination of habit and skeletal characters of the type material of S. digitata and both type and freshly collected material of S. cervicornis. The conclusion is strengthened by the discovery of a new species, Sollasella moretonensis n.sp. collected in North Australia (primarily in the northeastern coast, but also an isolated record from the...
Tipo: Article / Letter to the editor
Palavras-chave: Sponges; Classification; Sollasellidae; Raspailiidae; Sollasella; Raspailopsis; Australia; Oman; 42.72.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/214536

Marine and freshwater sponges (Porifera) of the Netherlands
Provedor de dados: 16
Autores: Soest, R.W.M. van.
The collections of the Rijksmuseum van Natuurlijke Historie at Leiden and the Zoologisch Museum of Amsterdam contain 19 species of Porifera (15 marine and 4 freshwater species) originating from the Netherlands. Among the marine species, Halichondria panicea (Pallas, 1766), Halichondria bowerbanki Burton, 1930, Haliclona oculala (Pallas, 1766), Cliona celata (Grant, 1826), Scypha ciliata (Fabricius, 1780) (two forms) and Leucosolenia botryoides (Ellis &amp; Solander, 1786) (two forms) appeared to be most common. Rare or moderately rare species proved to be Ficulina ficus (Linnaeus, 1767), Prosuberites epiphytum (Lamarck, 1816), Mycale contareni (von Martens, 1824) and Haliclona loosanoffi Hartman, 1958. Hymeniacidon perlevis (Montagu, 1812), Ciocalypta...
Tipo: Article / Letter to the editor
Palavras-chave: 42.72.
Ano: 1977
URL: http://www.repository.naturalis.nl/record/319414

Mycale species (Porifera: Poecilosclerida) of Northwest Africa and the Macaronesian Islands
Provedor de dados: 16
Autores: Soest, R.W.M. van; Beglinger, E.J.; Voogd, N.J. de.
Based on collections assembled by Dutch expeditions to the Northwest African region, including the offshore islands in the neighbouring Atlantic, a taxonomic monograph of sponges of the genus Mycale is presented. Additional material from the region borrowed from the Zoologisk Museum of the University of Copenhagen and incidental samples made by individual collectors were also included. The combined collections contained sixteen species, nine of which are new to science: Mycale (Aegogropila) syringosimilis spec. nov., Mycale (Aegogropila) tenerifensis spec. nov., Mycale (Arenochalina) africamucosa spec. nov., Mycale (Carmia) atropha spec. nov., Mycale (Carmia) guineensis spec. nov., Mycale (Naviculina) cruzi spec. nov., Mycale (Paresperella) janvermeuleni...
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Sponges; New species; Mycale; Saharan Upwelling; Sahelian Upwelling; Macaronesia; 42.72.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/516158

Ecology and distribution of two sympatric, closely related sponge species, Halichondria panicea (Pallas, 1766) and H. bowerbanki Burton, 1930 (Porifera, Demospongiae), with remarks on their speciation
Provedor de dados: 16
Autores: Vethaak, A.D.; Cronie, R.J.A.; Soest, R.W.M. van.
North Atlantic coastal waters harbour two closely related sympatric sponges belonging to the genus Halichondria, viz. H. panicea and H. bowerbanki. From the study of their littoral and sublittoral microdistribution and ecology in the Oosterschelde area (= Eastern Scheldt, S.W. part of The Netherlands) it is concluded that both occupy largely similar niches, although it was found that H. panicea is better equipped to endure exposure to air since it occurs up to a higher intertidal level than H. bowerbanki, while the latter is better equipped to withstand siltation. Other environmental factors as depth, light, current velocity and salinity affect the distribution and behaviour of both species similarly. From these observations it can be inferred, that...
Tipo: Article / Letter to the editor
Ano: 1982
URL: http://www.repository.naturalis.nl/record/504447

First record of the Scyphomedusa Deepstaria enigmatica Russell, 1967, from the mid north Atlantic ocean (Coelenterata, Scyphozoa)
Provedor de dados: 16
Autores: Winkler, J.Th.; Soest, R.W.M. van.
A description is given of a specimen of Deepstaria enigmatica Russell, 1967, caught in a haul made with the Rectangular midwater trawl RMT 1+8 at 24°52.0’ N 29°59-5’ W during the Amsterdam Mid North Atlantic Plankton Expedition 1980. The specimen, which was damaged during capture, is the third recorded. It is compared with the descriptions of two previously recorded specimens from the Pacific Ocean and the Gulf of Mexico.
Tipo: Article / Letter to the editor
Ano: 1981
URL: http://www.repository.naturalis.nl/record/505365

Zoogeography and speciation in the Salpidae (Tunicata, Thaliacea)
Provedor de dados: 16
Autores: Soest, R.W.M. van.
This paper represents a general study of two major phenomena in the taxonomy of the lower taxa of the Salpidae and their bearing on theories about the origin of the recent species. Arguments are presented that point strongly to a specific status for closely related forms previously described as infraspecific by most authors. Latitudinalclinal variation, reported for the first time in salps in a previous paper of the present author, is now demonstrated to be a uniform trend in all species with a wide distribution into temperate waters. Some indications are found that support the assumption that the clinal forms represent separate populations with a small degree of genetic difference. Thalia democratica (Forskål, 1775) is divided into two formae, forma...
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/505074

Thaliacea of the Bermuda area
Provedor de dados: 16
Autores: Soest, R.W.M. van.
A large number of samples of Salpidae, Doliolidae and Pyrosomatidae, collected by the U. S. Ocean Acre Project, are studied. A new record for the Bermuda area of Doliopsis rubescens (Vogt, 1817) is given. Dominant species are Iasis zonaria (Pallas, 1766), Salpa fusiformis Cuvier, 1804, and Salpa aspera Chamisso, 1819. Seasonal peak occurrences are observed for several species. The seasonal and vertical variation of the number of muscle fibres of aggregate Salpa fusiformis and aggregate Salpa aspera is studied and discussed.
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/505266

Juvenile colonies of the genus Pyrostremma Garstang, 1929 (Tunicata, Thaliacea)
Provedor de dados: 16
Autores: Soest, R.W.M. van.
Four remarkable dome-shaped, apparently juvenile colonies, belonging to the genus Pyrostremma Garstang, 1929, are described from the Bermuda area. Comparison with juvenile colonies of P.agassizi (Ritter &amp; Byxbee, 1905), and with larger colonies, fragments and loose zooids of P.agassizi and P.spinosum (Herdman, 1888), has rendered it likely, that these juvenile colonies belong to P.spinosum. The species of Pyrostremma are discussed.
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/505453

Unforeseen importance of historical collections as baselines to determine biotic change of coral reefs: the Saba Bank case
Provedor de dados: 16
Autores: Hoeksema, B.W.; Land, J. van der; Meij, S.E.T. van der; Ofwegen, L.P. van; Reijnen, B.T.; Soest, R.W.M. van; Voogd, N.J. de.
Botanical and zoological collections may serve as archives for historical ecological research on the effects of global change and human impact on coral reef biota. Museum collections may harbour old specimens of reef-dwelling species that have become locally extinct. Such collections also help to determine whether early records of invasive species can be obtained from times when they were not yet recognized as such. A case study (2006) involving Saba Bank, Caribbean Netherlands (former Netherlands Antilles), suggests that the coral reef fauna here may have become impoverished when compared with data obtained during an earlier expedition in 1972. However, the 1972 sampling may have been incomplete, as it was performed by professional divers who were not...
Tipo: Article / Letter to the editor
Palavras-chave: Biodiversity; Global change biology; Historical ecology; Invasive species; Local extinctions; Natural history museums.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/409031