The most diagnostic character is the keeled, funnelshaped protoconch

Type locality: Southeastern Iceland, Skeidarardypet, c. 200 m.
From Norway there are three samples from the Andfjorden area, eight and two fairly well preserved shells from two Lophelia reef samples, and seven from a sample from Bleiksdjupet northwest of Andoya, (69°25'N, 200-700 m, stones and clay). In addition a single shell from the western 'slope' of the Norwegian Trench (83.11.17.5, 61°30'N, 02WE, 311 m). All of the Norwegian samples are from depths around or a little below 300 m. Only empty shells found, and thus not verified that it is still living here. Outside Norway, 20 shells on which the description was based from 200 m in south-eastern Iceland. The only known additional material is two shells from 156 m in eastern Greenland (Waren 1991). With the material from Norwegian waters listed above, the distribution limit is moved considerably eastwards.