Figure 2
From: The girdles of the oldest fossil turtle, Proterochersis robusta, and the age of the turtle crown
SMNS 17757, Proterochersis robusta , Late Triassic (Norian) Löwenstein Formation of Baden-Württemberg, Germany. (A) Photograph and illustration of pelvic girdle in oblique right ventrolateral view. (B) Photograph and illustration of sacrum in oblique posteroventral view. (C) Photograph and illustration of posterior cervical column and anterior thoracic column in ventral view. Abbreviations: ac = acetabulum; cau = caudal vertebra; cer = cervical vertebra; cr = cervical rib; lpp = lateral pubic process; sr = sacral rib; tho = thoracic vertebra; tr = thoracic rib. Shaded areas represent damaged bone surfaces.