CONICET | Buscador de Institutos y Recursos Humanos

A new species of bivalve belonging to the family Vesicomyidae, Laubiericoncha puertodeseadoi,n. sp., is described. The material was collected during several cruises to thecontinental margin of Argentina on board of the R/V ?Puerto Deseado?. The distribution of thegenus Laubiericoncha is expanded to include the southwestern Atlantic Ocean. The descriptionwas done by using morphological characters of the shell and mantle cavity organs. All type materialof congeneric species was examined and illustrated. Laubiericoncha puertodeseadoi,n. sp., is characterized by a compressed, subrectangular, elongated, inequilateral shell, withslightly prosogyrous umbo and a well-defined triangular pallial sinus, strong external ligamentand ctenidia with two robust demibranchs, foot anteriorly projecting and fused siphons. Thisnew species constitutes the first record of the genus Laubiericoncha living on the continentalmargin off Argentina.