Ondina normani ( Friele, 1886 )

Høisaeter, Tore, 2014, The Pyramidellidae (Gastropoda, Heterobranchia) of Norway and adjacent waters. A taxonomic review, Fauna norvegica 34, pp. 7-78 : 48-49

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.