Biomphalaria prona (Gastropoda: Planorbidae): a morphological and biochemical study
| Autor: | C. Balzan, A. F. Pernot, Renzo Nino Incani, P. Chrosciechowski, W. Lobato Paraense, J. P. Pointier, B. Delay |
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| Jazyk: | angličtina |
| Rok vydání: | 1992 |
| Předmět: |
Microbiology (medical)
lcsh:Arctic medicine. Tropical medicine biology lcsh:RC955-962 Directional selection Ecology Biomphalaria prona lcsh:QR1-502 Biomphalaria biology.organism_classification Venezuela lcsh:Microbiology Planorbidae Gastropoda parasitic diseases Biomphalaria havanensis morphology Type locality Endemism allozymes Gastropoda Planorbidae |
| Zdroj: | Memórias do Instituto Oswaldo Cruz, Volume: 87, Issue: 2, Pages: 171-179, Published: JUN 1992 Memórias do Instituto Oswaldo Cruz., Vol 87, Iss 2, Pp 171-179 (1992) |
| Popis: | Two samples of Biomphalaria prona (Martens, 1873) from Lake Valencia (type locality) and seven from other Venezuelan localities were studied morphologically (shell and reproductive system) and biochemically (allozyme electrophoresis). In spite of marked differences in shell characters, all of them proved indistinguishable under the anatomic and biochemical criteria. So far B. prona has been considered an endemic species, restricted to Lake Valencia. It is now demonstrated that the extralacustrine populations refered to Biomphalaria havanensis (Pfeiffer, 1839) by several authors correspond in shell characters to an extreme variant of B. prona from the Lake and really belong to the last*mentioned species. They may be regarded as the result of a process of directional selection favoring a shell phenotype other than those making up the modal class in the Lake. |
| Databáze: | OpenAIRE |
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