Figure 66. A in The Palaeozoic Ancestry of Salamanders, Frogs and Caecilians

Figure 66. A, skull of the amphibamid Amphibamus grandiceps (Field Museum of Natural History PR664) from the Westphalian D of Mazon Creek, Illinois, showing the early ossification of most of the circumorbital bones, in contrast to (B), the comparably sized branchiosaurid, Apateon (see Fig. 54C1), in which these bones are slower to ossify. C, skeleton of Amphibamus grandiceps, showing the long, salamander-like tail. Reproduced from Milner (1982).