Ondina normani (Friele, 1886)

Figure 82

Odostomia Normani Friele, 1886:29

Odostomia normani Friele - Friele & Grieg 1901; Odhner 1939

Ptychostomon normani (Friele) - Kobelt 1903

Toledonia normani (Friele) - Thiele 1928

Menestho (Evalea) normani - Høisaeter 1986

Ondina normani (Friele) - Smith & Heppell 1991; Warén 1991; Schander 1995; Høisaeter 2009

Type material: Two syntypes ZMBN 21621 .

Type locality: Florø (61°36’N), 54 m.

Material seen: Norway - Skagerrak, 4 spms; Møre og Romsdal 11 spms; Nord-Trøndelag, 2 spms; Nordland, 3 spms.

Diagnosis: Shell: Smooth and glistening, unsculptured. Small first postlarval whorl. Fairly conical shell (as opposed to the rather more cylindrical species of Liostomia). Columellar tooth retracted and weak. A distinct umbilicus is usually present. Soft parts: Not known. Operculum: Not known.

Biology: Not known, but the single specimen from Grimseidpollen pictured in Figure 82 indicates that it might be commensal with Phascolion strombus .

Distribution: So far only reported from Norway. In addition to the type material from Florø (Warén 1991), recorded from Bergen and outer Sognefjorden (Friele & Grieg 1901), and two specimens and five shells from Tromsø (69°40’N) (Schander 1995). In my material 16 specimens and five shells from all around the coast from Saltfjorden (67°10’N, 170- 90 m, shell gravel) to the Skagerrak coast. Thus the species seems to be fairly common in Norwegian waters.

Remarks: The species is discussed in Warén (1991) and Schander (1995). Based on studies of the type material, Høisaeter (1986) accepted it as a valid member of Ondina . For some reason Schander (1995) claimed that Høisaeter (1986) synonymized O. normani with O. diaphana, which is not true. But some specimens from western Norway tend towards O. diaphana, as shown in Figure 82.