Figure 4. Proterochersis robusta NHMUK 38653 in Obscure by name: solving the enigma of Chelytherium obscurum, the first described Triassic turtle

Figure 4. Proterochersis robusta NHMUK 38653 (referred specimen of Chelytherium obscurum). A, B, NHMUK 38653 x, left costal: A, external view; B, visceral view. C–E, NHMUK 38653 y, part of the carapace margin: C, dorsal view; D, natural cross-section (? anterior view); E, ventral view.