Genus Planoscalpellum Zevina, 1978

Arcoscalpellum Hoek, 1907: 85 (part).

Planoscalpellum Zevina, 1978b: 1347 .

Diagnosis. Upper latus with umbo on scutal margin; inframedian latus with umbo apical or sub-basal; carinal latus with umbo on carinal part, may be protruding.

Type species. Scalpellum planum Hoek, 1883 .

Composition. Four species.

Distribution. Worldwide, except polar areas. Known depth range 1301 to 6180 m.