In this catalogue, the valid species belonging to the superfamily Mactroidea living in American waters are recognized. In the study area the family Mactridae, includes 12 genera and 48 species distributed in three subfamilies (Mactrinae, Lutrariinae and Darininae). There are Ten genera belonging to the subfamily Mactrinae living in American waters. They are Harvella, Mactrellona, Mactromeris, Mulinia, Rangia, Simomactra, Spisula, Standella, Trinitasia and Tumbeziconcha. Lutrariinae is only represented by the genus Tresus and includes three valid species living in the north western cost of North America. On the other hand, the subfamily Darininae is represented by the genus Darina with two valid species living in the southern tip of South America. The family Anatinellidae is represented by two genera with two valid species each one, all included into the subfamily Kymatoxinae. Finally, the family Mesodesmatidae is represented in American waters by the genus Mesodesma with 3 valid species and the recently described Amarilladesma with only one species.

Fil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina