Fig. 16
Scalpellum triangulare Hoek, 1883: 130, pl. III, figs 17–18, pl. XI, fig. 4; Zevina, 1964: 253.
Arcoscalpellum triangulare: Newman & Ross, 1971: 84, fig. 42; Zevina, 1981a: 326–327, fig. 248; Young, 1992: 54, fig. 8 c–e.? Arcoscalpellum triangulare: Foster & Buckeridge, 1995a: 355, fig. 3D.
Material examined. Three syntypes NHM UK 2013.1090-1092, Stn 320: Atlantic, Southwest (off Rio La Plata, Argentina); 1097 m. Found together with S. parallelogramma Hoek, 1883; attached to a sclerodermous zoantharian.
Supplementary description. Young (1992).
Distribution. Atlantic, Southwest and Antarctic; Pacific, Antarctic;?Pacific, Western Central. Known depth range (135?) 370 to 1097 m.
Habitat. On corals and polychaete tubes.