Quinkana

Quinkana is an extinct genus of mekosuchine crocodylians that lived in Australia from about 25 million to about 10,000 years ago, with the majority of fossils having been found in Queensland. Four species are currently recognized, all of which have been named between 1981 and 1997. The two best understood species are Q. fortirostrum, the type species, and Q. timara, a more gracile form from the Miocene. The other two species, Q. babarra and Q. meboldi, from the Pliocene and Oligocene respectively, are only known from a few poorly preserved bone fragments. The name Quinkana comes from the "Quinkans", a legendary folk spirit from Gugu-Yalanji mythology.

Quinkana is primarily known for its ziphodont teeth, meaning they were recurved, serrated and possessed flattened sides that gave them a blade-like shape. However, technically such teeth are only known from two species, as the basalmost form lacked serrations while the holotype of Quinkana fortirostrum did not preserve teeth in its alveoli. The genus is distinguishable by the combination of these ziphodont teeth and a deep, altirostral skull that is sometimes compared to those of sebecosuchians and planocraniids, leading some early researchers to mistakenly assign Quinkana to said groups. Quinkana is typically estimated to be around in length and to weigh around , though some remains from the Pliocene could suggest an even greater size. However, these estimates are based on fragmentary specimens and dimensions of related genera as there have been no complete Quinkana specimens found.