Pronounced Peramorphosis in Lissamphibians—Aviturus exsecratus (Urodela, Cryptobranchidae) from the Paleocene–Eocene Thermal Maximum of Mongolia
Figure 8
Ventral view of cranial cavity anterior portion in recent cryptobranchids.
(A) Andrias japonicus (NMA unnumbered specimen). (B) right half of cranial cavity of An. davidianus (ZFMK 76996). (C) left half of cranial cavity of Cryptobranchus alleganiensis (ZFMK 5245). Abbreviations: ab, anterior bump; bc, cranial cavity; f, frontal; fps, frontoparietal sutur; fs, frontal suture; obc, olfactory region of cranial cavity; ot, olfactory tract; ow, olfactory windows; p, parietal; ps, parietal suture. Scale bar = 5 mm.