Cuneatus is an extinct genus of gar that inhabited western North America during the early Paleogene.

As the genus name suggests, they are distinguishable from modern gar by their cuneate (wedge-shaped) heads, with a significantly shortened snout.

[3] The type species of the genus was described as "Lepisosteus" cuneatus by Edward Drinker Cope from the Green River Formation of Utah.

[1] Both species are common in mass death assemblages from the "Lake Uinta" division of the formation.

[4][5] The largest species in the genus, Cuneatus maximus, was described by Brownstein (2022) from the Willwood Formation of Wyoming, from which it is the first known fossil fish.