Fig. 13 in Palaeoecology of tropical marine invertebrate assemblages from the Late Triassic of Misurina, Dolomites, Italy

Fig. 13. Coelostylinid gastropods Helenostylina convexa (Nützel and Kaim, 2014) from Lago Antorno (A, B, C), Misurina Skilift (D), and Misurina Landslide (E), northern Italy, Cassian Formation, Carnian, Upper Triassic. A. PZO 12812, relatively large specimen with well-preserved base with spiral ribs, in apertural view (A1); A2, early whorls in lateral view; A3, basal view showing spiral ribs; A4, oblique basal view showing spiral ribs on base. B. PZO 12813, relatively large specimen with spiral ribs on base and protoconch with tubercles, in apertural view (B1); B2, close up of base showing spiral ribs on base; B3, early whorls with tubercles on larval shell, in lateral view. C. PZO 12814, juvenile shell with tubercles on larval shell, in lateral view. D. PZO 12694, juvenile shell with tubercles on larval shell and healed shell fracture, in apertural (D1) and lateral (D2, D4) views; details showing end of larval shell (arrows), in lateral (D3) and apical (D5) views. E. PZO 12695, relatively large specimen with well-preserved base with spiral ribs and protoconch with tubercles, in apertural view (E1); E2, oblique apertural view to show base with spiral ribs; E3, protoconch in lateral view.