Checklist:
Scalpellum regium Wyville-Thomson, 1873: in part, only figs 1-2; Wyville-Thomson, 1877: in part, figs 2-3; Pilsbry, 1907a: in part, only pl. III, fig. 4.
Scalpellum regium ovale: Hoek, 1883: 109, pl. V, figs 5-6.
Scalpellum gigas Gruvel, 1902a: 52 and 126, pl. II, fig. 3A, Pl. III, figs 22-26 [not Scalpellum gigas Hoek, 1883) = Trianguloscalpellum ovale (Hoek, 1883)].
Trianguloscalpellum gigas: Foster & Buckeridge, 1995b: 169, fig. 2E [not Scalpellum gigas Hoek, 1883) = Trianguloscalpellum ovale (Hoek, 1883)].
Trianguloscalpellum regium ovale: Zevina, 1981a: 311, fig. 235.
Trianguloscalpellum ovale: Young, 1998b: 32-33, fig. 21a,b; 1999: 181; 2001a: 741; 2002: 342; Poltarukha & Zevina, 2006b: 166, fig. 4; Poltarukha, 2010: 455-457, fig. 456.
Remarks: This material was dredged together with T. regium regium (W. Thomson, 1873) and it was initially considered as a subspecies. However, Young (1998 b) separated T. ovale as a distinct species basing on shell plate characters. T. ovale is also similar to T. gigas, but differs in the carina tectum and the peduncle plates (Young, 1998b).