Genus Deharvengia Bonnet, 1979, emend. Bobrov, Shimano and Mazei, 2012

Diagnosis: The shell is transparent, oval or ovoid in broad view, and circular to narrowly elliptical in cross-section. The aperture is elliptic or narrowly elliptic, located on the ventral side and positioned approximately at 6/7 of the length of the entire test. It is surrounded by a thin organic lip. On the dorsal side, the shell forms a small cap over the pseudostome, sometimes accompanied by a narrow organic lip along the edge. The shell is covered with elongate-elliptic idiosomes, which vary in size across different species. Transparent clavate spines may be present on each side of the test.