Buccinum undatum Linnaeus 1758

Buccinum undatum Linnaeus, 1758 (Fig. 11D 1-D 3) Buccinum undatum Linnaeus, 1758: 740. — Wood 1848: 35, pl. 3, fig. 12a-b. — Harmer 1914: 90, pl. 6, figs 1-10, pl. 7, figs 1-6, pl. 8, figs 1-2, pl. 10, fig. 13. — Domènech & Martinell 1982: 52, fig. 16. — Marquet 1997: 91, pl. 7, fig. 6. — Wesselingh et al. 2014: 194, fig. 1. — Símonarson & Eiríksson in Eiríksson & Símonarson 2021: 277, pl. 7.5, fig. 2. For more, see synonymy list in Marquet (1997) and Símonarson et al. (2021). MATERIAL AND DIMENSIONS. — Maximum height 32.1 mm, width 18.7 mm. — RGM.1364922 (2), leg. WG; RGM.1365005 (3), leg. ACJ; RGM.1365109 (11), leg. AWJ; RGM.1365187 (1), leg. AWJ. SPECIES CHARACTERISATION. — Shell large, relatively fragile, broadly fusiform; protoconch not preserved; teleoconch of four strongly convex whorls separated by impressed linear suture; sculpture of weak spirals cords with secondaries variably developed; sinuous axial ribs variably developed on early whorls weakening abapically, obsolete on last 1-2 whorls; aperture large, ovate; outer lip weakly thickened by varix, sinuous in profile; columella twisted at fasciole, columella and parietal callus moderately expanded over base, variably thickened. DISTRIBUTION. — Lower Pliocene: NSB, Coralline Crag, England (Wood 1848; Harmer 1914). — Upper Pliocene: NSB, Belgium (Marquet 1997), Red Crag, England (Wood 1848; Harmer 1914). — Lower Pleistocene: Atlantic, Iceland (Eiriksson & Símonarson 2021), Atlantic, West Greenland (Símonarson 1981), Selsoif, NW France (this paper). — Upper Pleistocene: western Mediterranean, Spain (Domènech & Martinell 1982); central Mediterranean, Italy (Malatesta & Zarlenga 1986), Baltic (Funder et al. 2002). — Holocene: NSB (Strand Petersen 2004). Today, this species is present in the North Atlantic, from Greenland and New Jersey on the western side and Iceland to the Bay of Biscay (Fretter & Graham 1984). Occurs in every kind of habitat, but prefers soft bottoms, lowest tide line to 1200 m depth. REMARKS Although highly variable, it cannot be confused with any other species.The Selsoif specimens are mostly incomplete but ascribed to the species without doubt. This is a boreal species.