The quadratojugal is a small jaw bone that is present in most amphibians, reptiles, and birds, but has been lost in mammals. It is connected to the jugal as well as other bones, though these may vary with species.
The quadratojugal bone is a small bone between the cheek and otic notch (Lecointre 380). Squamates (lizards and snakes) lack a quadratojugal bone (Schwenk 193).
Famous quotes containing the word bone:
“the bone dry voices of the peepers
as they throb like advertisements.”
—Anne Sexton (1928–1974)