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Postcranial osteology of Xenopus laevis (A,C) and Kassina maculata (B,D) shown in dorsal (A,B) and ventral (C,D) views. AS, astragalus; CA, calcaneum; CL, clavicle; CO, coracoid; F, femur; H, humerus; IC, ischium; IL, ilium; MC, metacarpals; ME, mesosternum; MT, metatarsals; OM, omosternum; PH, phalanges; PU, pubis; RU, radioulna; S, sacral vertebrae; SC, scapula; SS, suprascapula; SU, fused sacrourostyle; TF, tibiofibula; U, urostyle; V, vertebrae.
