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‣ State of the art in taxonomy of Chilean freshwater bivalves: Advances and difficulties

Fonte: Universidade Católica de Temuco Publicador: Universidade Católica de Temuco
Tipo: Artículo de Revista
Português
Relevância na Pesquisa
39.091511%
An update of the Chilean freshwater bivalve taxonomy is presented. The bivalves described at present are adscribed to two families: Hyriidae represented only by the genus Diplodon with two species (D. chilensis and D. solidulus) and Sphaeriidae represented by three genera: Pisidium with seven species (P. chilense, P. magellanicum, P. lebruni, P. observationis, P. meierbrooki, P. huillichum and P. llanquihuense), Sphaerium with two species (S. lauricochae and S. forbesi), and Musculium with two species (M. argentinum and M. patagonicum). Sub-generic and sub-specific taxa are recognized for Hyriidae only. The present study includes the synonymy, type locality and geographic distribution where the species have been recorded. The most reliable diagnostic features for Hyriidae species identification are the hinge morphology in adult specimens, the presence or absence of the valve teeth, and their position and shape in larvae. At the generic level within Sphaeriidae, the most reliable taxonomic characters are the morphology and number of the siphons, and the size of both demibranchs. At the species level these characters are valve morphometry and morphology, which includes beak position, hinge features, shape and size of cardinal teeth, valve sculpture and pore density of the inner surface of valves. Results are discussed regarding advances and conflicts related to the taxonomic and systematic arrangement in both families...

‣ Estado de conocimiento de los bivalvos dulceacuicolas de Chile

Fonte: Universidade Católica de Temuco Publicador: Universidade Católica de Temuco
Tipo: Artículo de Revista
Português
Relevância na Pesquisa
59.712573%
The current knowledge about the Chilean freshwater bivalves is presented. The bivalves described at present are adscribed to two families: Hyriidae represented only by the genus Diplodon with two species (D. chilensis and D. solidulus) and Sphaeriidae represented by three genera: Pisidium with seven species (P. chilense, P. magellanicum, P. lebruni, P. observationis, P. meierbrooki, P. huillichum and P. llanquihuense), Sphaerium with two species (S. lauricochae and S. forbesi), and Musculium with two species (M. argentinum and M. patagonicum). Subgeneric and subspecific taxa are recognized for Hyriidae only. Pisidium chilense, P. huillichum, P. llanquihuense P. lebruni and D. solidulus are proposed as endemic species for Chile. It is allocated the geographic distribution of the species, the taxonomic implications of the phenotypic variations exhibited by hyrids, the causes of the declination of the populations and the lack of knowledge in both families are analyzed. Specialists on the field and the available collections are listed.; Se presenta el estado actual del conocimiento de los bivalvos dulceacuícolas chilenos. Las especies descritas a la fecha, pertenecen a las familias Hyriidae, representada sólo por el género Diplodon con dos especies (D. chilensis y D. solidulus) y Sphaeriidae con tres géneros: Pisidium con siete especies (P. chilense...