UCMP 31865, the holotype skull of Vigilius wellesi (A). The maxilla of the holotype does not preserve any dentition, but the marginal tooth sockets are small (B), especially when compared to the sockets and dentition of the dentary teeth in UCMP 36834 (C). Hadrokkosaurus dentition and sockets also appear to be larger than the sockets of Vigilius (D).

 
 
  Part of: So C, Mann A (2024) A large brachyopoid from the Middle Triassic of northern Arizona and the diversity of brachyopoid temnospondyls from the Moenkopi Formation. Fossil Record 27(1): 233-245. https://doi.org/10.3897/fr.27.117611