d'Orbigny, 1847
Small to large, ovate to subpentagonal, slightly auriculate, valves biconvex; anterior commissure rectimarginate to uniplicate; surface capillate, capillae may be enlarged or granular, with prominent nodules in young; umbo suberect, foramen incomplete, mesothyridid to permesothyridid, deltidial plates disjunct, pedicle collar present. Crura converging, crural processes uniting, forming ringlike loop, transverse band ventrally arched; median septum and hinge plates absent; socket ridges and crural bases fused, forming prominent ridge, hinge teeth without swollen bases, but with sulcus on inner face; lophophore plectolophous, median coil short, spicules abundant.
Source: Moore, 1965.
The following species that belong to this genus occurs in this region:
Terebratulina retusa