%0 Journal Article %T REGISTRO DE POLIPLOIDIA EN LA ALMEJA DULCEACUICOLA MUSCULIUM ARGENTINUM (D'ORBIGNY 1835) (SPHAERIIDAE, VENEROIDA) %A Jara-Seguel %A Pedro %A Peredo %A Santiago %A Parada %A Esperanza %J Gayana (Concepci¨®n) %D 2005 %I Scientific Electronic Library Online %R 10.4067/S0717-65382005000100006 %X the polyploidy is an unusual character in bivalve mollusks. however, cytogenetic data documented for north-hemispheric species of the subfamily sphaeriinae (family sphaeriidae), showed chromosome numbers ranging from 36 to ca. 247. the freshwater clam musculium argentinum (d'orbigny 1835) has a polyploid chromosome number 2n = ca. 130, which shows that polyploidy likewise may be present in south american sphaeriids. these cytogenetic data suggest that the subfamily sphaeriinae could constitute a mature polyploid complex %K sphaeriidae %K musculium argentinum %K polyploidy %K polyploid complex. %U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-65382005000100006&lng=en&nrm=iso&tlng=en