Krzyzanowskisaurus Krzyzanowskisaurus

Krzyzanowskisaurus (meaning “Stan Krzyżanowski’s lizard”) is the name given to a genus of archosaur from the Late Triassic-aged Chinle Formation and it is a tooth taxon, based on fossils only of teeth (such as the holotype tooth NMMNH P-29357) and these teeth have been found in the U.S. states of Arizona (including the type locality) and New Mexico. The original report described it as a “probable ornithischian” and Heckert (2005) suggests that Krzyzanowskisaurus teeth have biostratigraphic utility as an index fossil of the St. Johnsian sub-LVF (land-vertebrate faunachron).

The type species, Krzyzanowskisaurus hunti, was reevaluated by Heckert in 2005, after previously being described by him as Revueltosaurus hunti in 2002. The name was changed when it was discovered that the type species of Revueltosaurus, R.