Genus Glyptelasma Pilsbry, 1907

Glyptelasma Pilsbry, 1907a: 87.

Diagnosis.

Capitulum with five approximate, fully calcified plates; scutum quadrangular, umbone subcentral; carina becoming larger towards base; peduncle short.

Type species.

Megalasma (Glyptelasma) subcarinatum Pilsbry, 1907a: 91, pl. VII, figs 1-5; type locality: Atlantic Ocean, East of New Jersey, USA.