Planoscalpellum planum (Hoek, 1883)

Fig. 23

Scalpellum planum Hoek, 1883: 116, pl. IV, figs 12–13; Murray, 1896: 362; Weltner, 1897: 249; 1900: 307; Gruvel, 1902b: 248; 1905: 87, fig. 97; Schmalz, 1906: 69; Nilsson-Cantell, 1955: 218.

Planoscalpellum planum: Zevina, 1978b: 1347; 1981a: 185–186; 1981b: 89; Jones et al., 1990: 4; Jones, 1991: 153; 2012: 371, 376; Young, 2007: 39–41, figs 47–49, table 10.

Material examined. Holotype (dry) NHM UK 2013.1112, Stn 160: Indian Ocean, Eastern; 4758 m.

Supplementary description. Young (2007).

Distribution. Indian Ocean, Eastern; Pacific, Eastern Central: off Costa Rica, Gulf of Panama. Known depth range 421 to 4758 m.

Remarks. The holotype is dry and in poor condition. Designating a neotype is probably advisable in order to stabilise its nomenclature.