Cerithiopsis indet

Bouchard, Blanche, Wesselingh, Frank P., Pouwer, Ronald & Landau, Bernard, 2025, The Gelasian gastropod fauna of Selsoif (Manche, France), Geodiversitas 47 (3), pp. 39-91 : 55

Cerithiopsis indet .

( Fig. 6E 1-E 3 , F 1-F 3 , G 1-G 3 )

MATERIAL AND DIMENSIONS. — Height 4.6 mm (incomplete), width 1.7 mm. — RGM.1365212 (1), leg. ACJ ; RGM.1365310 (9), leg. ACJ ; RGM.1365307 (1), leg. ACJ; RGM.1365306 (1), leg. ACJ ; RGM.1365308 (2), leg. ACJ ; RGM.1364977 (23), leg. ACJ ; RGM.1365309 (1), leg. ACJ ; RGM.1365311 (1), leg. ACJ ; RGM. 1365313 (1) leg. unknown , RGM.1365078 (c. 135) leg AWJ , RGM.961903 (26), leg. AWJ ; RGM.961908 (7), leg. unknown .

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

REMARKS

Cerithiopsidae can only be reliably identified using protoconch characteristics. The absence of protoconch in all our specimens make it impossible to make a definitive identification. The illustrated specimens show some of the morphological variability encountered in the Cerithiopsis specimens at hand.

Figures

FIG. 6. — Gastropods from Selsoif.All illustrated specimens are collected from the Sablière du Grand Marais,Selsoif,France and come from the Early Pleistocene Saint- Nicolas de Pierrepont Formation (continuation): A, Monophorus indet., RGM.1365279, leg AWJ, H = 17.19 mm; B, Seila selsoifensis Marquet 2001, RGM.1365180, leg ACJ, H = 3.4 mm;C, Seila quinquecarinata n. sp. (holotype), MNHN.F.A91316,leg AWJ, H = 4.2 mm;D, Seila quinquecarinata n. sp. (paratype), RGM.1365312, leg AWJ, H = 3.9 mm; E, Cerithiopsis sp., RGM.1365306, leg ACJ, H = 3.5 mm; F, Cerithiopsis indet., RGM.1365309, leg ACJ, H = 2.8 mm; G, Cerithiopsis indet., RGM.1365212, leg ACJ, H = 2.15 mm. Scale bars:A1-A3, 5 mm; B1-B3, C1-C3, D1, D2, E1-E3, G1-G3, 1 mm; B4, 200 μm; F1-F3, C4, D3, 500 μm.

FIG. 1. — Simplified geological map of the Normandy region (after Dugué et al. 2000 and Pareyn 1987) showing the location of Selsoif:1, Precambrian-Palaeozoic basement; 2, Permo-Mesozoic Paris Basin fill; 3, Neogene-Quaternary subbasins.

FIG. 3. — Simplified biographic map of South-West of Europe (after Landau et al. 2011).