Genus Hemithyris Orbigny, 1847

Type species:Anomia psittacea Gmelin, 1790.

Posterior part of pedal valve (beak) is slightly curved. Deltidial plates which limit foramen anteriorly do not meet each other and are disjunct. Dental plates which connect the teeth to the bottom of pedal valve are strait and vertical. In the top part of pedal valve the pedicle collar (suspended anteriorly) is suspended with short median septum or with small septal roller. In brachial valve cardinal process and inner hinge-plates are absent, and a short median septum does not reach the top of valve. Gonads are reticulate.