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Cyclothyris vesicularis (Coquand, 1860) from the Late Campanian of Aubeterre (Charente). A–C. Large specimen MNHN.F.A70583 (Péron coll.): dorsal view, profile revealing a depressed lateral commissure, and twisted anterior commissure. D–F. Specimen MNHN.F.A70584 (Péron coll.). G–I. Small adult specimen MNHN.F.S08809 (Péron coll.); close-up view of the ventral posterior shell with the foramen (I). J–L. Specimen SU.PAL.2018.0.55.22.1 (Arnaud coll.) from Puyvigier revealing some digitations of the costellae. M–P. Specimen SU.PAL.2018.0.55.22.2 of Puyvigier obviously with growing old signs (increasing thickness of the margins to the detriment of length and width), close-up view revealing that two/three costellae fused in one costa near the margins (P). Scale bars = 5 mm, except (I and P) = 2 mm. Photographs: P. Loubry.
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