Genus Trianguloscalpellum Zevina, 1978b

Arcoscalpellum Hoek, 1907: 85 (part). - Pilsbry 1907a: 47. - Newman and Ross 1971: 42 (part).

Trianguloscalpellum Zevina, 1978b: 1349. - Liu and Ren 1985: 205.

Diagnosis.

Capitulum of female or hermaphrodite with 13 or 14 completely calcified plates; tergum and scutum with umbones apical; middle latera triangular, sometimes quadrangular, with apical umbo reaching upper latera; carinolatera triangular or subtriangular with apical umbo; caudal appendages distinctly long.

Type species.

Scalpellum balanoides Hoek, 1883: 129, pl. V, fig. 15, pl. X, fig. 11, pl. XI, figs 1-3; type locality: 5°42'S, 132°25'E; depth: 236 m; bottom: mud; it was found attached to an arm of a Comatula or Pentacrinus .