Shell subequivalve, inequilateral, rostrated posteriorly and rounded anteriorly. « Hinge feeble, edentate or with small cardinal tubercles and lateral ridges. » – Poutiers & Bernard: “Carnivorous bivalve molluscs (Anomalodesmata) from the tropical western Pacific Ocean, with a proposed classification and a catalogue of Recent species” in Bouchet: Résultats des Campagnes MUSORSTOM 14. Mémoires du Muséum national d’Histoire naturelle. Série A, Zoologie, Paris 1995, p.148.
Cardiomya Linnaeus, 1758:
Sculpture of strong, sharp radials; rostrum finely adorned with concentric ribs. Left valve slightly larger and more convex than the right.
Cuspidaria Nardo, 1840:
Sculpture of commarginal striae, ribs or folds.
Tropidomya Dall & Smith, 1886:
« Rostrum short, trigonal. A small anterior cardinal tooth in both valves. (Poutiers & Bernard). One posterior keel on each valve, at the root of the rostrum.
