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Showing 1 to 20 of 68 for “"Gastropoda"”.
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A Study Of The Gastropoda Of Fontenelle Forest
The terrestrial pulmonates of Fontenelle Forest, Omaha, Nebraska, have been made the object of the following study. A checklist of the terrestrial snails of Nebraska is not available and a search of the literature revealed little information on the gastropods of Nebraska. Walker (1906) listed a …
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Histofisiología del epitelio renal de helix aspersa (mollusca, gastropoda, pulmonata, stylommatophora)
La excreción es, por definición, la separación de los productos de desecho de los fluidos tisulares y corporales, y su eliminación del organismo. Además, se considera como el resultado de la filtración del líquido de la sangre, de la reabsorción de ciertos compuestos y de la secreción de sustancias …
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Taxionomia e morfologia de Pomacea lineata (Spix, 1827) (Mollusca, Gastropoda, Ampullariidae)
This work deals with the internal and external anatany of Pomacea lineata (SPIX, 1827). The descriptions and figures of the soft parts and shell, reproductive, digestive, excretory, respiratory, circulatory and nervous systems are given. Microanatomic studies of the male copulatory apparatus were …
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A tribo Marginellini Fleming, 1828 na costa brasileira (Mollusca, Gastropoda, Marginellidae)
The generic and specific taxonomy of the tribe Marginellini Fleming, 1828 is examined. This study was based on fossil and Recent material deposited in Brazilian and foreign collections, public and private. The tribe is represented in the Brazilian coast by two genera: Eratoidea Weinkauff, 1879 and …
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Responses of the false limpet, Siphonaria pectinata (Gastropoda, Pulmonata) to osmotic stress
Investigations were conducted on the littoral euryhaline molluso Siphonaria pectinata Linnaeus which inhabits the granite jetties near Galveston, Texas, Animals were subjected to a wide range of salinities, and the [delta-t-f] and sodium concentrations of the body fluids were measured under …
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Estudo sobre as espécies brasileiras de Astraea Röding, 1798 (Mollusca, Gastropoda, Turbinidae)
The species of genus Astraea Röding, 1798, A. (Astralium) latispina (Philippi, 1844) and A. (Lithopoma) olfersii (Philippi, 1846), were study based on shell, opercula, external morphology of soft parts, mantle cavity, digestive and urogenital systems, similarities and diferences are regarded and …
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Conquiologia e anatomia de Orthalicus pulchellus (Spix,1827) (Mollusca, Gastropoda, Pulmonata, Orthalicidae)
Studies on shell, Jaw, radula, palial camera roof and reproductive system are presented, including macro and microanatomical characterizations of the penis appendix, what enabled the characterization and distinction of Orthalicus pulchellus (Spix, 1827) from the other known species of Orthalicidae …
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Contribuição ao conhecimento da taxonomia em Thais (Stramonita) haemastona (Linnaeus, 1767) (Mollusca, Gastropoda, Muricidae)
The gastropod mollusc Thais haemastoma (Linnaeus, 1767) is characterized, including its taxonomic positioning up to the subclass level. Descriptions of the shell, operculum and radula are included, as well as of some soft parts which represents taxonomically important characters. Data related to …
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Anatomia e histologia do aparelho reprodutor e dados biológicos de Pomacea sp. (Mollusca, Gastropoda, Pilidae)
In this paper the author gives an anatomical and histological study of the reproductive system of Pomacea sp in order to obtain a rnorphological base to add to the knowledge of the features that we use in the specific identification of pilids. They give some general taxonomic considerations the …
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The escape of veligers from the egg capsules of Nassarius obsoletus and Nassarius trivittatus (gastropoda, prosobranchia)
Many species of prosobranch gastropod deposit their eggs in tough capsules affixed to hard substrates. Generally, there is a small opening near the top of such capsules, occluded by a firm plug (operculum) which must be removed before the veligers can escape. Although the removal of the operculum …
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Caracoles terrestres (Gastropoda, stylommatophora) de Andalucía, con especial referencia a las provincias de Sevilla y Cádiz
La idea de realizar un estudio sobre moluscos terrestres nació con el objetivo fundamental de aportar nuevos datos que incrementaran el conocimiento faunístico, taxonómico y biogeográfico de estos animales en Andalucía. Si bien pretende abarcar la totalidad del territorio andaluz (al que …
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Estudo da anatomia dos moluscos do gênero Cyphoma Roding, 1798 (Gastropoda - Ovulidae) que ocorrem no Brasil
The present study is based on the morfoanatomic description of the genus Cyphoma mollusks (Castropoda-Ovulidae) which occurs in Brazil, trying also to solve the taxonomic problems found in the specialized literature. From the four brazilian species, it was the first description the soft parts of C. …
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Revisão taxonômica das espécies do gênero Turbonilla Risso, 1826 (Gastropoda: Pyramidellidae) reportadas para o litoral brasileiro
The species ofthe genus Turbonilla Risso, 1826 previously recorded to the Brazilian coast are reviewed on a conchological basis after comparisons against their type-series. T abrupta Bush, 1899; T amoldai Jong & Coomans, 1988; T atypha Bush, 1899; T brasi/iensis Clessin, 1900; T coomansi Aartsen, …
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Taxonomia, morfologia e distribuição geográfica das espécies incluídas em Hypselartemon Wenz, 1947 (Mollusca, Gastropoda, Pulmonata, Streptaxidae)
The Streptaxidae family, constituted by carnivorous land snails molluscs, has circuntropical distribution and is strongly represented in Brazil, with an estimative of 60 living species described. Taxonomic and morphological problems embracing the Brazilian species are still common, making the …
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Stable Isotope Sclerochronology of Melanopsis (Gastropoda) Shells: Inferring Late Pleistocene Seasonality in the Upper Jordan River Valley
Sub-weekly to sub-monthly records of δ 18 O and δ 13 C values in Melanopsis shells from the Jordan River Dureijat (JRD) archaeological site in the upper Jordan River Valley are assessed for changes in seasonal hydrology in the gastropod’s habitat, and these records are compared to results from one …
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