Monophorus indet

Monophorus indet .

( Fig. 6A View FIG 1-A View FIG 3 View FIG )

MATERIAL AND DIMENSIONS. — Height 3.7 mm (incomplete) mm, width 1.5 mm. — RGM.1365279 (1), leg. AWJ .

SPECIES CHARACTERISATION. — We only have one damaged specimen lacking protoconch. The earliest whorl preserved has two primary spiral cords, S1 and S3 with large tubercles developed at intersections with narrow axial ribs; the profile between the two spiral cords is concave. S2 appears between S1 and S2, strengthening on later whorls, of almost equal strength on last whorl. The overall shape and tardive S2 fits well in the genus Monophorus , but the damaged specimen cannot be attributed to any species (H. Bakker, pers. comm.)

DISTRIBUTION. — Lower Pleistocene: Atlantic, Selsoif, NW France (this paper).