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Showing 1 to 12 of 12 for “"radula"”.
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Contribuição ao conhecimento da taxonomia em Thais (Stramonita) haemastona (Linnaeus, 1767) (Mollusca, Gastropoda, Muricidae)
… 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 geographic distribution, synonyms and records of the species in Brazil are also given.
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Taxionomia e morfologia de Pomacea lineata (Spix, 1827) (Mollusca, Gastropoda, Ampullariidae)
… family names were pointed out. The shell and the radula are not available features to discriminate the species since the first showed instraspecific variation and the latter is very similar in all the family. Probably, in the male reproductive system are some of the diagnostic features of the …
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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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Subsídios para o conhecimento de Laevapex diaphanus (Haldeman, 1841) (Mollusca: Basommatophora: Ancylidade)
… fuscus by the asmymmetric central tooth in the radula, smaller seminal vesicle, prostate and ovotestis , less pronounced mantle pigmentation The structure of the penial complex without flagellum, with a well-developed ultra-penis and lateral penis pore, and a conspicuous hollow core of black …
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Biochemical and morphological systematics of the Southern African gastropod genera Burnupena (Buccinidae) and Oxystele (Trochidae)
… remain difficult to identify. Examination of the radulae from all of the species of Burnupena using both light and electron microscopy showed that the radula is of little or no practical value in distinguishing between species. Whilst some differences could be detected in some characters, these …
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Investigating Predation in the Fossil Record: Modern Analogs
… between predator body size, predatory radula dentition, and radular microrasping marks observed on the shells of prey organisms. Electron micrographs were used to measure the spacing of microrasping marks produced by the radula, and the intercusp spacing of the radula dentition. A …
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Anatomia e histologia do aparelho reprodutor e dados biológicos de Pomacea sp. (Mollusca, Gastropoda, Pilidae)
… hard parts, that they considered as being shell, radula and jaw; and the soft parts, that is, the male and female reproductive system, and finally the biological data about the animal “in natura” and in the laboratory. The specimens were trapped in Jardim Botânico, Rio de Janeiro, and were taken …
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Estudo da anatomia dos moluscos do gênero Cyphoma Roding, 1798 (Gastropoda - Ovulidae) que ocorrem no Brasil
… species analised. The mantle pattern and the radula were the caracterers more used to differentiate the species. A revision on the geographic distribuition of these species is done. C. signatum was the only species that showed doubts on the specific identification, due to the marking …
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Macroanatomia, microanatomia e histologia dos sistemas reprodutor e digestivo de Thaumastus (Thaumastus) Taunaisii (Ferussac, 1822), T. (T.) Magnificus (Grateloup, 1839) e T. (T.) Achilles (Pfeiffer, 1852) (Mollusca, Gastropoda, Stylommatophora, Bulimulidae)
… that together with the studies of the shell, radula and jaw made it possible to identify and to characterize Thaumastus (Thaumastus) taunaisii (Férussac, 1822), Thaumastus (Thaumastus) magnificus (Grateloup, 1839) and Thaumastus (Thaumastus) achilles (Pfeiffer, 1852).
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Life history dynamics of nudibranch sibling species in the genus Dendronotus in the Gulf of Maine
… larvae revealed regular differences in radula morphology, and no predictable differences in the reproductive system. These data and previous data on a behavioral reproductive isolation mechanism suggest a new species designation for populations of Dendronotus with lecithotrophic larvae. …
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Biophysical Model of Retraction Motor Neurons and Their Modification by Operant Conditioning
… gut by closing a tongue-like structure (i.e., radula) during the retraction phase of the BMP (Susswein and Byrne, 1988). Recent studies show that OC leads to increased intrinsic excitability in the major retraction motor neurons B6 and B9, while no significant changes were observed in B3 …
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Structure, function, and functional morphology of Mitra idae Melvill 1893 and M. catalinae Dall 1920
… the epiproboscis;-(3) the odontophore; ( 4) the radula; and (5) the esophagus. M. catalinae should probably be placed within the subfamily Cylindromitrinae.</p> <p>M. idae and M. catalinae feed on supinculids, as do other species of mitrids studied. The observed function of the epiproboscides of …