prevomers

Noun

prevomer (plural prevomers)

1. A bone from non-mammalian vertebrates forming the anterior roof of the palate.
   • Only in the Chelonia (Fig. 32 b) are the prevomers single, though sometimes fused in the Rhiptoglossa, Theropoda, and Theriodontia (Figs. 43 c, 44 e). They are edentulous in all known reptiles except the Cotylosauria (Fig. 6), some Theromorpha, perhaps, certain "Pseudosuchia," Diaptosauria (Fig....1925, Samuel Wendell Williston, “Chapter 1”, in The Osteology of the Reptiles