SciELO - Scientific Electronic Library Online

 
vol.75 issue4The impact of forestry, agriculture, and cattle grazing activities on the quality of landscape in a transect of southern ChileBiogeographical analysis of the pteridophyte diversity of continental Argentina and Chile author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista chilena de historia natural

Print version ISSN 0716-078X

Abstract

PARADA, ESPERANZA  and  PEREDO, SANTIAGO. Estado actual de la taxonomía de bivalvos dulceacuícolas chilenos: progresos y conflictosState of the art in taxonomy of Chilean freshwater bivalves: advances and difficulties. Rev. chil. hist. nat. [online]. 2002, vol.75, n.4, pp.691-701. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2002000400005.

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, the difficulties in data compilation, the need to re-describe some species using cytogenetic and molecular techniques, and to increase this database with new records in geographic areas not yet studied. Pisidium chilense, P. huillichum, P. llanquihuense and P. lebruni are proposed as endemic species for Chile and zoogeographic regions are sketched based on the distribution of Chilean spheriids reported at the present.

Keywords : Hyriidae; Sphaeriidae; taxonomy; endemic species; zoogeographical regions; Chile.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License