Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 51
Primeira ... 123 ... Última
Imagem não selecionada

Imprime registro no formato completo
A biosystematic basis for pelagic biodiversity Naturalis
Spoel, S. van der.
Biodiversity can be considered to be a human appreciation of the biological entity diversity. Diversity can be expressed numerically on the basis of taxa found, but it can also be expressed as the contribution of a specimen to the diversity, for which a formula is proposed. Diversity is the sum of the taxonomic or numerical diversity, and the ecological, genetical, historical, and phylogenetic diversity. Moreover, each group, or larger taxon, has its own characteristic diversity. These types of diversity are considered separately. One formula is tentatively proposed to calculate the overall diversity. Diversity in nature is variable, which is demonstrated in a diagram for comparison with societyinduced diversity changes. Diversity in the pelagic fluctuates...
Tipo: Article / Letter to the editor Palavras-chave: Biodiversity; Diversity calculation; Ecology; Pelagic; Phylogeny.
Ano: 1994 URL: http://www.repository.naturalis.nl/record/504018
Imagem não selecionada

Imprime registro no formato completo
A new forma of the species Clio pyramidata Linnaeus, 1767 and a new resting-stage of Clio pyramidata Linnaeus, 1767 forma sulcata (Pfeffer, 1879) (Gastropoda, Pteropoda) Naturalis
Spoel, S. van der.
A new form is described in the polytypic species Clio pyramidata LINNAEUS, 1767. This new forma excisa was found at 57°31'S 02°56'W and it is related to the forms convexa (BOAS, 1886) and sulcata (PFEFFER, 1879). The shape of the shell of the new form excisa shows a great resemblance to the shape of the shell of these two forms and also a resemblance is present to the shape of the shell of the form martensii (PFEFFER, 1880). This resemblance, however, may indicate a relationship as well as a parallel development. The new forma and the form martensii live in the same area, so that the chemo-physical characteristics of the water may have caused a parallel development. As indicated in a previous paper, the polytypic species Clio pyramidata consists of several...
Tipo: Article / Letter to the editor
Ano: 1963 URL: http://www.repository.naturalis.nl/record/504828
Imagem não selecionada

Imprime registro no formato completo
A new taxonomic and zoogeographic interpretation of the Diacria quadridentata group (Mollusca, Pteropoda) Naturalis
Leyen, A. van; Spoel, S. van der.
Re-examination of the Diacria quadridentata species group based upon morphology of the shell and zoogeographic data, led to a new classification comprising the recent taxa: D. quadridentata, D. costata with an equatorial and a central water form, D. danae with an equatorial and a central water form, D. schmidti schmidti, D. erythra crassa and the fossil taxa D. schmidti cocidentalis and D. erythra erythra from surface sediments. A method has been developed to estimate the relative age of the population, based on the development of shell and soft parts. Shell growth in the period of minute and adult stages together does not exceed 0.2 mm, and differs from species to species.
Tipo: Article / Letter to the editor
Ano: 1982 URL: http://www.repository.naturalis.nl/record/505420
Imagem não selecionada

Imprime registro no formato completo
Annotated species list of the Mollusca, Tintinnida, Amphisolenia (Dinoflagellata) and Radiolaria collected in pump samples by the Amsterdam Mid North Atlantic Plankton Expeditions, 1980-1983 (Proj.101 A) Naturalis
Spoel, S. van der.
The mid North Atlantic between 24°N and 55°N along 30°W and between 20°W and 30°W along approx. 25°N, investigated by the AMNAPE cruises in the four seasons, spring (1980), summer (1983) autumn (1981) and winter (1982), is dominated by Temperate waters with a northern and southern branch of the North Atlantic Drift, Subtropical Sargasso Sea waters in the south and Subarctic waters in the north (Yen der Spoel, 1981, 1986; Van der Spoel & Meerding 1983; Pafort- van Iersel, 1985). The present study gives the relation of the microplankton distribution in the upper 5m of the water column with the hydrography and seasons.
Tipo: Article / Letter to the editor
Ano: 1987 URL: http://www.repository.naturalis.nl/record/506328
Imagem não selecionada

Imprime registro no formato completo
Are Pteropods really Ptero-pods? (Mollusca, Gastropoda, Pteropoda) Naturalis
Spoel, S. van der.
The columellar muscle system consists anteriorly of a high number of longitudinal branches surrounding a hydrocoel, which forms higher up two lateral, one ventral and four smaller dorsal bundles. These bundles enter the muscular envelope of head and nuchal region, which is formed out of the wing-wall muscles. The two lateral bundles proceed farest apically to insert on the buccal appendages; the four dorsal fibres fuse with the walls of buccal organs and oesophagus, while the ventral muscles run into the posterior and lateral footlobes. The wings are attached to the body by an extra right and left muscle neither derived from the columellar nor from the wing-wall muscle system. So the posterior and lateral footparts are mesopodal, the wings epipodal and the...
Tipo: Article / Letter to the editor
Ano: 1982 URL: http://www.repository.naturalis.nl/record/505289
Imagem não selecionada

Imprime registro no formato completo
Catalogue of the Polychaeta collected by the Siboga Expedition and type specimens of Polychaeta in the Zoological Museum of Amsterdam Naturalis
Bleeker, J.; Spoel, S. van der.
The polychaetous worms collected by the Siboga-Expedition (1899-1900) are listed with some annotations. A few specimens – identified by Augener and Pettibone but never published – are added, so that this list gives a complete survey of all Polychaeta collected by the mentioned expedition. The types of 269 nominal species present in the Institute of Taxonomic Zoology (Zoological Museum), Amsterdam are incorporated in this list, for some species lectotypes are desinated.
Tipo: Article / Letter to the editor
Ano: 1992 URL: http://www.repository.naturalis.nl/record/505308
Imagem não selecionada

Imprime registro no formato completo
Catalogue of the type specimens of Tunicata in the Zoological Museum in Amsterdam Naturalis
Spoel, S. van der.
The types of 360 nominal species of Tunicata present in the Zoological Museum in Amsterdam are listed, for some species lectotypes are indicated.
Tipo: Article / Letter to the editor
Ano: 1969 URL: http://www.repository.naturalis.nl/record/505464
Imagem não selecionada

Imprime registro no formato completo
Clio bartletti n.sp., a fossil new to science closely related to Clio cuspidata (Gastropoda, Thecosomata) Naturalis
Spoel, S. van der.
Clio bartletti n. sp. is described from a sediment sample containing a mixture of late Pleistocene and recent pelagic and benthic sediment. The sample is described and correlated with climatic fluctuations using protoconch size as a temperature indicator. In all probability the new species is an Alleröd fossil.
Tipo: Article / Letter to the editor
Ano: 1978 URL: http://www.repository.naturalis.nl/record/505528
Imagem não selecionada

Imprime registro no formato completo
Clio piatkowskii, a mesopelagic pteropod new to science (Gastropoda, Opisthobranchia) Naturalis
Spoel, S. van der; Schalk, P.H.; Bleeker, J..
A pteropod species new to science: Clio piatkowskii is described from benthopelagic samples taken in high Antarctic waters of the Weddell Sea. Comparisons with related species are made and its taxonomic place in the genus Clio is discussed.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pteropoda; Clio; Taxonomy; Plankton; Antarctica.
Ano: 1992 URL: http://www.repository.naturalis.nl/record/504812
Imagem não selecionada

Imprime registro no formato completo
Clio pyramidata Linnaeus, 1767 forma convexa (Boas, 1886) (Mollusca, Pteropoda) Naturalis
Spoel, S. van der.
The pelagic fauna of the Red Sea shows special variation induced by its isolated character (Van der Spoel, 1971). Clio pyramidata from the Red Sea is usually incorrectly referred to as the tropical forma lanceolata (Lesueur, 1813) or the typical forma pyramidata Linnaeus, 1767. Some large samples with C. pyramidata from the northern Red Sea made it possible to establish the correct identity of these populations. Though special variation, like described for Diacria and Cavolinia species (Van der Spoel, l.c.), is found for Red Sea populations of C. pyramidata, the populations are not separated as an endemic taxon as the specimens resemble closely Clio pyramidata forma convexa (Boas, 1886) (figs. 1-4). The anterior parts are almost identical to those of...
Tipo: Article / Letter to the editor
Ano: 1973 URL: http://www.repository.naturalis.nl/record/505325
Imagem não selecionada

Imprime registro no formato completo
Diacavolinia nov. gen. separated from Cavolinia (Pteropoda, Gastropoda) Naturalis
Spoel, S. van der.
Diacavolinia is described to comprise Cavolinia longirostris, a species which throws off the protoconchs-I and -II while the species of Cavolinia keep the protoconch in the adult stage. Phylogeny of the Cavoliniidae is discussed.
Tipo: Article / Letter to the editor
Ano: 1987 URL: http://www.repository.naturalis.nl/record/505451
Imagem não selecionada

Imprime registro no formato completo
Distribution of Myctophidae (Pisces, Myctophiformes) during the four seasons in the mid North Atlantic Naturalis
Spoel, S. van der; Bleeker, J..
The distribution, temperature, and size ranges of 60 species of myctophids in the North Atlantic between 55°N and 24°N along approximately 30°W are recorded for the four seasons. The general zoogeography and migration is discussed. Faunal groups of species, faunal borders, and transition zones near 50°N, 41 °N, and 29°N for myctophids are distinguished and discussed.
Tipo: Article / Letter to the editor Palavras-chave: Myctophidae; Biogeography; North Atlantic; Faunal borders.
Ano: 1991 URL: http://www.repository.naturalis.nl/record/504270
Imagem não selecionada

Imprime registro no formato completo
Finer sculptures in euthecosomatous shells, and their value for taxonomy (Mollusca, Pteropoda) Naturalis
Spoel, S. van der.
The protoconch in Limacina helicoides, Peraclis moluccensis, Styliola subula, Cavolinia globulosa, C. gibbosa, C. inflexa and C. longirostris are described; finer structures of the shell in these species and Hyalocylis striata, Diacra quadridentata and Cavolinia tridentata are described. The occurrence of a distinct protoconch-I and -II in Cavoliniidae is discussed as well as the taxonomic value of the structure of the ventral ribs in the Cavoliniidae mentioned.
Tipo: Article / Letter to the editor
Ano: 1976 URL: http://www.repository.naturalis.nl/record/505087
Imagem não selecionada

Imprime registro no formato completo
First records of fossil gymnosomatous protoconchae (Pteropoda, Gastropoda) Naturalis
Spoel, S. van der; Diester-Haass, L..
Fossil protoconchae of an unknown gymnosomatous pteropod are described from Late Pleistocene sediments.
Tipo: Article / Letter to the editor
Ano: 1976 URL: http://www.repository.naturalis.nl/record/505440
Imagem não selecionada

Imprime registro no formato completo
From Cavolinia longirostris to twenty-four Diacavolinia taxa, with a phylogenetic discussion (Mollusca, Gastropoda) Naturalis
Spoel, S. van der; Bleeker, J.; Kobayasi, H..
The six already known infraspecific taxa in Cavolinia longirostris (De Blainville, 1821), presently in the genus Diacavolinia, are raised to species rank and sixteen species and two formae new to science are described in this genus from different oceanic areas. Some shell structures in the Cavoliniinae are described for the first time and the phylogeny of the group is discussed.
Tipo: Article / Letter to the editor Palavras-chave: Taxonomy; Pteropoda; Cavoliniidae; Diacavolinia; New species; Phylogeny.
Ano: 1993 URL: http://www.repository.naturalis.nl/record/503859
Imagem não selecionada

Imprime registro no formato completo
Geographical variation in Cavolinia Tridentata (Mollusca, Pteropoda) Naturalis
Spoel, S. van der.
A redescription is given for five formae of Cavolinia tridentata and four formae new to science are described. The distribution of the species is given and the zoogeography of the formae is discussed.
Tipo: Article / Letter to the editor
Ano: 1974 URL: http://www.repository.naturalis.nl/record/504420
Imagem não selecionada

Imprime registro no formato completo
Growth, reproduction and vertical migration in Clio pyramidata Linné, 1767 forma lanceolata (Lesueur, 1813), with notes on some other Cavoliniidae (Mollusca, Pteropoda) Naturalis
Spoel, S. van der.
Shell growth and size variation in populations of Diacria trispinosa Clio pyramidata, Cuvierina columnella, and Cavolinia gibbosa are studied. Attention is given to differences in the size variations of the four species caused by differences in their developmental biology. The reproductive cycle of Clio pyramidata forma lanceolata in the Bermuda Area is described and it is shown that there are more than one protandric hemaphrodite sexual cycles in one animal. The vertical migration of the four mentioned species is discussed.
Tipo: Article / Letter to the editor
Ano: 1973 URL: http://www.repository.naturalis.nl/record/505038
Imagem não selecionada

Imprime registro no formato completo
Juveniles of Cavolinia inflexa (Lesueur, 1813) and Cavolinia longirostris (de Blainville, 1821), their discrimination and development (Gastropoda, Pteropoda) Naturalis
Troost, D.G.; Spoel, S. van der.
In C. inflexa the mantle gland and its border show twenty-two bands. Differences in banding with C. longirostris are discussed. It appeared to be possible to discriminate the soft parts of juveniles in both species. Of special value for discrimination is the shape of the lateral appendages. The shells can be distinguished by the relative length of the caudal spine, which is longer in C. inflexa than in C. longirostris. Different developmental stages of C. longirostris are described and those of C. inflexa are added for comparison. While for the latter species the soft parts grow larger parallel with the increment of the shell, this is not the case in C. longirostris, due to the occurrence of minute stages and shedding of the caudal spine. The differences...
Tipo: Article / Letter to the editor
Ano: 1972 URL: http://www.repository.naturalis.nl/record/505296
Imagem não selecionada

Imprime registro no formato completo
List of discrete depth samples and open net hauls of the Amsterdam Mid North Atlantic Plankton Expedition 1980 (project 101A) Naturalis
Spoel, S. van der.
The technical details and hydrographical data of the hauls with open nets and opening-and-closing nets, made during the Amsterdam Mid North Atlantic Plankton Expedition are given together with the general conditions during the sampling period April 11 – May 2, 1980. A temperature and salinity profile between 55° and 25°N to a depth of 2000 m are presented with ten XBT records.
Tipo: Article / Letter to the editor
Ano: 1981 URL: http://www.repository.naturalis.nl/record/505292
Imagem não selecionada

Imprime registro no formato completo
List of discrete depth samples and open net hauls of the Amsterdam Mid North Atlantic Plankton Expedition 1981 (Project 101A) Naturalis
Spoel, S. van der; Meerding, A.G.H.A..
The technical details and hydrographical data of the hauls with open nets and opening-closing nets, made during the Amsterdam Mid North Atlantic Plankton Expedition, are given, together with the general conditions during the sampling period September 15 – October 6, 1981. Temperature and salinity profiles are given for the sampled area roughly between 55°N 30°W and 24°N 30°W and between 24°N 30°W and 27°N 20°W.
Tipo: Article / Letter to the editor
Ano: 1983 URL: http://www.repository.naturalis.nl/record/505427
Registros recuperados: 51
Primeira ... 123 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional