Fig. 15. Trochotomid gastropod Trochotoma vetusta Terquem, 1855 in Earliest Jurassic patellogastropod, vetigastropod, and neritimorph gastropods from Luxembourg with considerations on the Triassic-Jurassic faunal turnover

Fig. 15. Trochotomid gastropod Trochotoma vetusta Terquem, 1855 from Brouch (Mersch, Grand−Duchy of Luxembourg), Late Hettangian (Schlotheimia angulata Zone, Schlotheimia complanata Subzone), Early Jurassic. A. MNHNL BR704, dorsal (A1), apical (A2), lateral (A3), and apertural (A4) views. B. MNHNL BR754, dorsal (B1), apical (B2), subapertural (B3) views, and detail of the exhalant hole and of the shell seam (B4). C. – MNHNL BR710, apical (C1), dorsal (C2), basal (C3), and apertural (C4) views. D. MNHNL BR361, apertural (D1), basal (D2), dorsal (D3), apical (D4), and lateral (D5) views. E. MNHNL BR705, dorsal (E1) and apical (E2) views, and detail of the exhalant hole and of the shell seam (E3). The arrow indicates the position of the selenizone.