Fig. 4 in A new family of giant Jurassic-Cretaceous littorinoid gastropods from the northern Tethys shelf

Fig. 4. Littorinoid gastropod Leviathania gigantea (Makowsky, 1874) from the Tithonian of Dörfles in LowerAustria. A. Specimen NHMW2011/0347/0003, showing the natural cast of the umbilical cavity with the scaly surface of the growth increments (A1). Silicone casts of the cavities, which remained from dissolution of the original shell in different views (A2–A4). View into the original umbilical cavity (A2), note the prominent swelling on the columellar wall which corresponds to the umbilical concavity. Lateral view on the columella with central swelling and narrow fold directly below the upper suture (A3). Apical view showing the umbilical cavity (A4). B. Specimen NHMW2011/0347/0001, apical view of the neotype. C. Specimen NHMW2011/0347/0004, silicone cast of the surface of the spire in apical (C1) and lateral (C2, C3) views; the growth line is indicated by a black line in C2.