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| Registros recuperados: 346 | |
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| Bogdanova, T.N.; Prozorovsky, V.A.. |
| This paper focuses on the Barremian/Aptian boundary in the Trans-Caspian area. Results of a stratigraphical study of the uppermost Barremian and the lower Aptian succession in the Trans-Caspian area are presented. The bed-by-bed description of three sections — Keldzhe, Tekedzhik and Utuludzha — is given as well as detailed lithologic columns. Five ammonite zones are known in the studied stratigraphic interval — the Turkmeniceras turkmenicum, Deshayesites tuarkyricus, D. weissi, D. deshayesi, and Dufrenoya furcata zones. These zones are correlated with those of Europe. The Barremian/ Aptian boundary in the Trans-Caspian area should be drawn at the base of the D. tuarkyricus Zone. It corresponds to the layers with the first occurrences of Deshayesites,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Trans-Caspian area; Barremian; Aptian; Ammonite zones; Correlation; Boundary stratotype; 38.22; 42.73. |
| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/216196 |
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| Dadon, J.R.. |
| After a massive mortality of the dominant species (the clam Mesodesma mactroides) occurred in 1995, changes in the intertidal community in sandy beaches of Argentina were monitored. Eight sampling stations were established in a 40 km open stretch and samples were taken every October each year up to 2001. Biomass, density, size frequency distribution and mean growth rates for the most abundant species were analyzed. During the mortality event, only the benthic stages of M. mactroides were affected, their total mean biomass diminishing from 1,399 g to 2 g per running meter beach. Post-mortality recruitment was normal and the growth rates for the youngest cohorts were similar to those previously reported. After a two years’ lag, the wedge clam Donax... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Surf clams; Mesodesma mactroides; Donax hanleyanus; Sandy beaches; Benthos; Argentina; Species interactions; 42.73. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/214338 |
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| Regteren, C.O. van. |
| INTRODUCTION The palaeolithic deposits of the rock shelter of Ksâr'Akil in the Antelias valley have been excavated by a group of American Jesuits in the years 1937-1938 and 1947-1948. Recently the fossil bones from these deposits were reported upon by my colleague Hooijer (1961). When he received the material for description it appeared that his samples contained a large collection of molluscan shells and a few spines of echinoderms as well. These are dealt with in the present paper. To the best of my knowledge they are all the remains of molluscs and echinoderms found during the excavation. For further details on the collection and the site I refer to Hooijer's paper, which also contains references to the literature on Ksâr'Akil. A few shells from the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.22; 42.73. |
| Ano: 1962 |
URL: http://www.repository.naturalis.nl/record/318343 |
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| Bayer, Ch.. |
| Drupa (Maculotriton) buitendijki n. sp. (Pl. I, fig. 1). Testa parvula, tenuis, elongato-turrita, nitidula. Anfractus 10, apice laevi anfractibus 3l/2 annumerata, liris subtilimis, longitudinalibus et transversis ad decussationem nodulosis reticulata Varices 10. Apertura ovata, utrinque attenuata, labro intus elevato-striato, inferne in canalem brevem subrecurvum desinens. Lutescente-albida, fuscescente hie illic tincta, apertura alba. Long. 14,5 mm, lat. 5,5 mm. Shell small, thin, elongately turreted, glossy. Whorls 10, including a smooth, rather acuminated 31/2 whorled nucleus. Sculpture: varices 10. Whorls and also varices with very fine longitudinal and spiral striae, which at their intersection form a little nodule, producing thus a net with quadrate... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1933 |
URL: http://www.repository.naturalis.nl/record/318806 |
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| Boesveld, A.. |
| Overwintering habits of the land snail Vertigo angustior (Mollusca) During a mollusc survey in 2004 en 2005 in the province of Zuid-Holland special attention was paid to Vertigo angustior. The species was observed overwintering in large groups, up to hundreds of specimens together, between mosses (especially Brachythecium rutabulum (Hedw.) Schimp.) in small patches of poplar forest (Populus nigra and Populus alba) in the old dunes. As far as we know, this gregarious behaviour is described here for the first time. Many of the snails were found in a position where they had incorporated a moss leaf into the epiphragm closing the shell’s aperture, thereby achoring themselves to the vegetation, possibly for stability. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Nederland; Biologie; Biotoop; 42.73. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/262189 |
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| Appleton, C.C.. |
| INTRODUCTION Van Bruggen (1974) discussed the identity of specimens of the North American pulmonate genus Helisoma Swainson, 1840 (Mollusca: Planorbidae) from three localities in southern Africa. He identified Helisoma (Seminolina) cf. duryi seminole Pilsbry, 1934, from a farm dam in South West Africa and Helisoma (?Pierosoma) sp. from an artificial pond at Mandini in Zululand (recorded as Helisoma sp. by Brown, 1967) and from Cape Point on the Cape Peninsula. These identifications were based on shell characters since only dry material was available. Snails belonging to Helisoma have been collected by the present author from two additional localities and are examined below. Both these populations occur(red) in the suburban areas of major South African... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/317992 |
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| Pintér, L.; Riedel, A.. |
| Dr. E. Gittenberger (Leiden) hat uns eine Probe einer kleinen Zonitidenart, die er auf Kérkyra ( = Korfu) gesammelt hat, zur Beurteilung und Bearbeitung zugeschickt. Bereits bei der ersten flüchtigen Untersuchung war uns klar, hier mit einer unbekannten Art zu tun zu haben, aber die generische Zugehörigkeit konnte leider nicht angegeben werden. Auch während späterer Untersuchungen konnten wir nur eine annähernde generische Bestimmung erreichen, da sich Arten dieser Gruppe der Zonitiden nur nach anatomischen Merkmalen einwandfrei einer Gattung zuordnen lassen. Da die Schalenmerkmale in erster Linie für die Gattung Lindbergia Riedel, 1959, sprechen, beschreiben wir die neue Art wie folgt. Lindbergia gittenbergeri spec. nov. (Abb. 1-3) Beschreibung. — Schale... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/318260 |
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| Bayer, Ch.. |
| Since the publication in 1908 of the „Catalogue systématique des Mollusques" by R. HORST and M. M. SCHEPMAN, the collection of 's Rijks Museum van Natuurlijke Historie has attained a not unimportant extension, so that since long this catalogue is no more up to date. After the revision of the genus Bursa, which resulted into the addition to the collection of a great deal of hitherto unidentified material and which brought about several changes in the catalogue, it seemed necessary to me, to edit a new catalogue of this genus, and it is my intention to publish such a list every time when a new part of the collection has been revised. In order to give this catalogue a more general value, I have included as far as possible, all the true species of Bursa which... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1932 |
URL: http://www.repository.naturalis.nl/record/318804 |
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| Martin-Icke, H.. |
| In einer Abhandlung von Caesar R. Boettger über Petricola pholadiformis Lam. 1) führt derselbe, über die Erscheinung dieser Muschel in Europa sprechend, die folgende Ansicht von Loppens an: „Pour expliquer l'apparition subite sur nos côtes en 1899 de ces animaux perforants, qui vivent sur les côtes de l'Amérique du Nord, on peut admettre, que plusieurs individus, engagés dans des poutres, auront été entrâinés par les courants de l'Atlantique et qu'ainsi ils ont pu échouer dans nos parages". Hierzu bemerkt Boettger: „Diese Ansicht wäre wohl sehr einleuchtend, wenn man Petricola pholadiformis schon in Balken eingebohrt gefunden hätte; doch habe ich weder bei amerikanischen noch bei europäischen Autoren diese Tatsache gefunden; ich selbst habe sie nie in Holz... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1915 |
URL: http://www.repository.naturalis.nl/record/318033 |
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| Jagt, J.W.M.. |
| Belemnitellid coleoids abound at some levels within the Gulpen and Maastricht formations in the study area, and ‘belemnite graveyards’ have long been known from the Bovenste Bos (Epen) and Slenaken-Beutenaken areas in southern Limburg, the Netherlands. Recent studies have demonstrated the presence of at least three species of the genus Belemnitella d’Orbigny, 1840, and five of Belemnella Nowak, 1913, and its subgenera Belemnella, Pachybelemnella Schulz, 1979, and Neobelemnella Naidin, 1975. Representatives of Belemnitella junior Nowak, 1913, and Belemnella (Neobelemnella) gr. kazimiroviensis (Skołozdrówna, 1932) are the only coleoids to reach the Cretaceous-Paleogene (K/Pg) boundary, and members of the latter group may even have persisted into the earliest... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Mollusca; Coleoides; Belemnitellidae; Cretaceous; Maastrichtian; Type area; 38.22; 42.73. |
| Ano: 2012 |
URL: http://www.repository.naturalis.nl/record/428931 |
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| Bruggen, A.C. van. |
| CONTENTS 1. Introduction.................. 3 2. Systematic part................. 6 Gulella adamsiana................. 7 Gulella darglensis................. 14 Gulella elliptica................. 19 Gulella farquhari................. 27 Gulella infrendens................ 33 Gulella planti...................................... 39 Gulella vicina....... ....... 44 Gulella zuluensis................. 49 3. Concluding remarks................ 54 4. Summary................... 58 5. References.................. 58 6. Index to trivial names in Gulella............. 62 1. INTRODUCTION The concept of subspecies has been applied to terrestrial molluscs at a comparatively early stage. Mayr (1942) quotes the works of Rossmässler (1826), Kobelt (1881), the Sarasin brothers... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1980 |
URL: http://www.repository.naturalis.nl/record/317764 |
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| Reijnen, B.T.; Hoeksema, B.W.; Gittenberger, E.. |
| Ovulid gastropods and their octocoral hosts were collected along the leeward coast of Curaçao, Netherlands Antilles. New molecular data of Caribbean and a single Atlantic species were combined with comparable data of Indo-Pacific Ovulidae and a single East-Pacific species from GenBank. Based on two DNA markers, viz. CO-I and 16S, the phylogenetic relationships among all ovulid species of which these data are available are reconstructed. The provisional results suggest a dichotomy between the Atlantic and the Indo-Pacific taxa. Fully grown Simnialena uniplicata closely resembles juvenile Cyphoma gibbosum conchologically. Cymbovula acicularis and C. bahamaensis might be synonyms. The assignments of Caribbean host species for Cyphoma gibbosum, C.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Anthozoa; Alcyonacea; Caribbean; Curaçao; Molecular phylogeny; Symbiosis; 42.73. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/336926 |
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| Registros recuperados: 346 | |
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