Colognathus is a
genus of
extinct reptile from
Late Triassic rocks of the southwestern
United States. It was described in 1928 from a jaw fragment by Case, who interpreted the new
taxon as a fish. The
type species is C. obscurus.
Colognathus was originally named Xenognathus by
Ermine Cowles Case in 1928,[4] but that name was
preoccupied, so Case provided the replacement name Colognathus in 1933.[2] Researchers have classified Colognathus as a reptile, although its lower-level classification remains uncertain, although it may be a procolophonid.[5][7]
^Schoch, Rainer R. (2011). "A procolophonid-like tetrapod from the German Middle Triassic". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 259 (2): 251–255.
doi:
10.1127/0077-7749/2011/0124.