Ondina obliqua ( Alder, 1844 )

Ondina obliqua ( Alder, 1844) View in CoL

Figure 83

Odostomia obliqua Alder, 1844:327 View in CoL

Odostomia obliqua Alder - Alder 1848 View in CoL ; Forbes & Hanley 1850 - 51; Jeffreys 1867; Marshall 1893, 1900

Chemnitzia obliqua (Alder) View in CoL - Clark 1855

Ptychostomon obliquum (Alder) - Kobelt 1903

Odontostomia (Ondina) obliqua (Alder) - Dautzenberg & Fischer 1925

Menestho (Evalea) obliqua (Alder) - Winckworth 1932; Høisaeter 1986

Ondina obliqua (Alder) View in CoL - van Aartsen 1987; Smith & Heppell 1991; Warén 1991; Peñas et al. 1996; Høisaeter 2009

Type material: Not known.

Type locality: Tynemouth, outside Newcastle, North Sea coast of England (fide Jeffreys 1867) .

Material seen: Norway - Hordaland, 2 shs.

Diagnosis: Shell: Distinguished by its upturned and almost disjoint protoconch and the rapidly increasing whorls. Soft parts: Not known. Operculum: Not known.

Biology: Not known.

Distribution: Not previously recorded from Norway. In my material a large specimen from Fitjar (59°54’ N, 18 m, leg. Per Johannessen) and a single old and worn shell from Raunefjorden (Hillersholmen, c. 60°18’ N, 8 m, coarse shell gravel), possibly subfossil. Outside Norway known from the Swedish west coast (Koster area, Warén 1991) and the British Isles south to the Biscay ( Fretter et al. 1986) and the Mediterranean, quite rare ( Warén 1991). Mentioned from the Scottish North Sea coast, ( McKay & Smith 1979). Sparingly in the western Mediterranean ( Peñas et al. 1996).

Remarks: A reference to G.O. Sars (1878) in Høisaeter (2009) is due to a misunderstanding. The shell at left in Figure 83 has lost the upturned protoconch. It has a golden brown surface which might be due to a periostracum. It is reported as being quite rare throughout its distribution, and is obviously extremely rare in Norwegian waters.