Cosgriffius

{{Short description|Extinct genus of amphibians}}

{{Automatic taxobox

| fossil_range =

| image =

| taxon = Cosgriffius

| authority = Welles, 1993

| subdivision_ranks = Species

| subdivision =

• C. campi Welles, 1993 (type)

}}

Cosgriffius is an extinct genus of trematosaurian temnospondyl within the family Trematosauridae.{{Cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=165270|title=Fossilworks: Cosgriffius|website=fossilworks.org|access-date=17 December 2021}}{{Cite journal|date=2017-06-29|title=A new extreme longirostrine temnospondyl from the Triassic of Madagascar: phylogenetic and palaeobiogeographical implications for trematosaurids|doi=10.6084/m9.figshare.5155366.v1 |url=https://figshare.com/articles/A_new_extreme_longirostrine_temnospondyl_from_the_Triassic_of_Madagascar_phylogenetic_and_palaeobiogeographical_implications_for_trematosaurids/5155366|language=en|last1=Fortuny |first1=Josep |last2=Gastou |first2=Stéphanie |last3=Escuillié |first3=François |author4=Lovasoa Ranivoharimanana |author5=J.-Sébastien Steyer |publisher=Taylor & Francis }}{{Cite web|url=https://blogs.scientificamerican.com/tetrapod-zoology/trematosauroid-temnospondyls/|title=blogs.scientificamerican.com/tetrapod-zoology/trematosauroid-temnospondyls/}} It was described in 1993 by Samuel P. Welles based on a single partial skull from the well-known Meteor Crater Quarry (Early Triassic Moenkopi Formation) in Arizona that also produced more abundant remains of the capitosaur Wellesaurus peabodyi.{{Cite journal |last=Welles |first=Samuel P. |date=1993 |title=A review of lonchorhynchine trematosaurs (Labryrinthodontia), and a description of a new genus and species from the lower Moenkopi Formation of Arizona |journal=PaleoBios |volume=14 |pages=1–24}} The skull was long and slender, features typically associated with the trematosaurid subfamily Lonchorhynchinae. This is the only trematosaurid known from western North America.