Quadratojugal bone

See also: Evolution of mammalian auditory ossicles

The quadratojugal is a skull bone present in many vertebrates, including some living reptiles and amphibians.[1]

  1. ^ Lecointre, Guillaume; Le Guyader, Hervé (2006). The tree of life: a phylogenetic classification. Harvard University Press, 2006. pp. 380. ISBN 9780674021839. Retrieved December 10, 2011.