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BIOMPHALARIA PRONA (GASTROPODA: PLANORBIDAE): A MORPHOLOGICAL AND BIOCHEMICAL STUDY
Biomphalaria prona
Biomphalaria havanensis
Morfologia
Venezuela
Isoenzimas
Biomphalaria prona
Biomphalaria havanensis
Morphology
Allozymes
Venezuela
Author
Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Malacologia. Rio de Janeiro, RJ, Brasil.
Laboratoire de Biologie Marine et Malacologie. Centre de Biologie Tropicale. École Pratique des Hautes Études. Perpignan, France.
Laboratoire de Génétique et Environnement. Institut des Sciences de L`Evolution. Montpellier, France.
Laboratoire de Génétique et Environnement. Institut des Sciences de L`Evolution. Montpellier, France.
Universidade de Carabobo. Facultad de Ciencias de la Salud. Departamento de Parasitologia. Laboratorio de Bilharzia. Valencia, Venezuela.
Dirección General Sectorial de Malariologia y Saneamiento Ambiental. Division de Parasitosis Intestinales y Esquistosomiasis. Maracy, Venezuela.
Dirección General Sectorial de Malariologia y Saneamiento Ambiental. Division de Parasitosis Intestinales y Esquistosomiasis. Maracy, Venezuela.
Laboratoire de Biologie Marine et Malacologie. Centre de Biologie Tropicale. École Pratique des Hautes Études. Perpignan, France.
Laboratoire de Génétique et Environnement. Institut des Sciences de L`Evolution. Montpellier, France.
Laboratoire de Génétique et Environnement. Institut des Sciences de L`Evolution. Montpellier, France.
Universidade de Carabobo. Facultad de Ciencias de la Salud. Departamento de Parasitologia. Laboratorio de Bilharzia. Valencia, Venezuela.
Dirección General Sectorial de Malariologia y Saneamiento Ambiental. Division de Parasitosis Intestinales y Esquistosomiasis. Maracy, Venezuela.
Dirección General Sectorial de Malariologia y Saneamiento Ambiental. Division de Parasitosis Intestinales y Esquistosomiasis. Maracy, Venezuela.
Abstract
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.
Keywords in Portuguese
Gastropoda PlanorbidaeBiomphalaria prona
Biomphalaria havanensis
Morfologia
Venezuela
Isoenzimas
Keywords
Gastropoda PlanorbidaeBiomphalaria prona
Biomphalaria havanensis
Morphology
Allozymes
Venezuela
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