Biomphalaria prona (Gastropoda: Planorbidae): a morphological and biochemical study
Mem. Inst. Oswaldo Cruz
;
87(2): 171-9, abr.-jun. 1992. tab, ilus
Artículo
en Inglés
| LILACS
| ID: lil-116301
RESUMO
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.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Biomphalaria
Límite:
Animales
País/Región como asunto:
America del Sur
/
Venezuela
Idioma:
Inglés
Revista:
Mem. Inst. Oswaldo Cruz
Asunto de la revista:
Medicina Tropical
/
Parasitología
Año:
1992
Tipo del documento:
Artículo
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