Mangelia undetermined

Mangelia sp. (Fig. 12F 1-F 3) MATERIAL AND DIMENSIONS. — Maximum height 3.6 mm, width 1.4 mm. — RGM.1365116 (6), leg. AWJ; RGM.1365293 (1), leg. ACJ; RGM.1365292 (5), leg. ACJ. SPECIES CHARACTERISATION. — Shell small, slender fusiform. Protoconch not preserved. Teleoconch of 4.5 convex, weakly shouldered whorls bearing ten elevated, opisthocline ribs, about half width of their interspaces. No sign of spiral sculpture; possibly abraded. Last whorl elongate, weakly shouldered, moderately constricted at base. Aperture elongate, outer lip incomplete. Columella weakly excavated, siphonal canal moderately long, open, wide. DISTRIBUTION. — Lower Pleistocene: Atlantic, Selsoif, NW France (this paper). REMARK All specimens are too incomplete and abraded to offer further identification.