Tellinidae Blainville, 1814

Arruda, Eliane P. & Domaneschi, Osmar, 2005, New species of Macoma (Bivalvia: Tellinoidea: Tellinidae) from southeastern Brazil, and with description of its gross anatomy, Zootaxa 1012 (1), pp. 13-22 : 15

Family Tellinidae Blainville, 1814

Subfamily Macominae Olsson, 1961

Genus Macoma Leach, 1819

Type­species: Macoma tenera Leach, 1819 , by monotypy (= Tellina calcarea Gmelin, 1791 ).

Diagnosis: Shell ovate to ovate­elongate, equivalve or subequivalve, equilateral or inequilateral, often flexed to right posteriorly. Periostracum dark, deciduous. Two cardinal teeth on each valve; right posterior and left anterior cardinals bifid; laterals absent. Pallial sinus deeper on left valve.