Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 66 for “"Mollusca"”.
-
The chiton fauna (Mollusca: Polyplacophora) of South Africa
Chitons are a diverse class of molluscs inhabiting marine waters and constitute a significant, yet relatively underexplored group of invertebrates in South Africa. Over the past three decades, taxonomic research has resulted in a pronounced increase in the description of regional chiton species, …
-
Kriauklių proteomika: Unionida (Bivalvia, Mollusca) kriauklių baltymų analizė rūšių identifikavimui /
Mollusks are one of the most widely used animal species. In prehistory people used mollusks as a source of food, decorated clothes, used shells to make jewelry, work tools and decorate pottery. However, it is difficult for scientists to accurately taxonomically determine which species were used in …
-
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 …
-
Resource Partitioning in Seven Species of Sympatric Intertidal Chitons (Mollusca: Polyplacophora)
<p>Space (intertidal height and location/exposure on the rock surface), and food {gut contents) were partitioned among 7 species of sympatric intertidal chitons: Mopaliidae - Mopalia hindsii, M. ciliata, ~· lignosa, M. muscosa, and Katharina tunicata; and Ischnochitonidae - Tonicella lineata and …
-
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 …
-
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 …
-
O gênero Nassarina Dall, 1889 (Mollusca: Caenogastropoda: Columbellidae) no Atlântico oeste
The taxonomy of recent representatives of the genus Nassarina Dali, 1889 for the Westem Atlantic is examined at generic and specific leveis. It is known that the genus is represented in the Atlantic Ocean by seven species, ali from the Westem Atlantic coast: N bushiae (Dall, 1889); N glypta (Bush, …
-
MICROMORPHOLOGY AND GENE EXPRESSION IN MUSCLE AND SHELL DEVELOPMENT OF THE MOLLUSCA
… of several basal representatives of the molluscan classes Polyplacophora, Bivalvia, Scaphopoda, and Gastropoda. Special reference is given to the shell musculature. In addition, aspects of the myo-anatomy of adult Solenogastres are reconsidered. A further part of this study deals with …
-
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 …
-
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 …
-
Subsídios para o conhecimento de Laevapex diaphanus (Haldeman, 1841) (Mollusca: Basommatophora: Ancylidade)
This study deals mainly with the anatomy fo Laevapex diaphanus (Haldeman, 1841), in comparison with Laevapex fuscus (Adams, 1841). L. diaphanus maybe distinguished from L. fuscus by the asmymmetric central tooth in the radula, smaller seminal vesicle, prostate and ovotestis , less pronounced mantle …
-
Behavioural differences between populations of Nassarius pauperatus (Mollusca: Prosobranchia) / by S.C. McKillup
132 leaves : ill., graphs, tables, maps ; 29 cm.
-
Reproductive Biology of the Flat Floater Mussel, Anodonta Suborbiculata, Say, 1831 (Mollusca: Unionidae)
The flat floater mussel, Anodonta suborbiculata , is a large, distinctive freshwater bivalve that formerly occurred in shallow lentic habitats throughout the Mississippi River Drainage. The flat floater is presently rare due to habitat loss. Several aspects of the reproductive biology of this …
-
Distribuição de Teredinidae Rafinisque, 1815 (Mollusca: Bivalvia) ao longo da costa sudeste do Brasil
The distribution of teredinid wood-boring molluscs along part of the southeast coast of Brazil was studied. The infestation levels were correlated to ecological factors such as wood supply, and the presence of fouling or competitor organisms. The hypothesis tested was: there is an infestation …
-
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 …
-
Contribuição ao conhecimento dos poliplacóforos do Estado do Rio de Janeiro, Brasil (Mollusca; polyplacophora)
Eleven species of chitones distributed by five genera belonging to the families Lepidopleuridae, Ischnochitonidae and Chaetopleuridae, all from the coast of the state of Rio de Janeiro, Brazil, are studied in this work. The taxonomic and morphological aspects are emphazised, aside from observations …
-
Thermal Tolerances of an Endemic Hot Spring Snail Physella wrighti Te and Clarke (Mollusca: Physidae)
Physella wrighti (Te and Clarke, 1985) is an Endangered freshwater snail endemic to the Liard Hot Springs in northern British Columbia. It inhabits water temperatures from 23.5oC to 36oC and is active year-round. Despite its conservation status, little else is known about this species. To advance …
Page 1 of 4