''Trucidocynodon'' is an
extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the endling, last individual of the species, although the Functional extin ...
genus Genus /ˈdʒiː.nəs/ (plural genera /ˈdʒen.ər.ə/) is a taxonomic rank In biological classification In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure ...
of ecteniniid cynodonts from Upper Triassic of Brazil. It contains a single species, ''Trucidocynodon riograndensis''. Fossils of ''Trucidocynodon'' were discovered in Santa Maria Formation outcrops in Paleorrota geopark Agudo, Rio Grande do Sul, Agudo. ''T. riograndensis'' was similar to ''Ecteninion lunensis'' from the Upper Triassic Ischigualasto, Ischigualasto formation of Argentina, but differed in several respects, including its larger size. It is known from a nearly complete holotype skeleton as well as a referred skull. The holotype skeleton had an estimated length of 1.2 meters (4 feet), while the referred skull was 17% larger than that of the holotype. ''Trucidocynodon'' is considered one of the largest known carnivorous cynodonts from the Triassic, as well as one of the largest probainognathians in the entire Mesozoic. A Biomechanics, biomechanical study has argued that ''Trucidocynodon'' not only had erect limbs, but that it also possibly had digitigrade forelimbs, being among the first synapsids to show adaptations for cursoriality. However, it was likely not a specialized runner, unlike ungulates and some other modern cursorial mammals.

See also

* List of therapsids


External links

Folha: Grupo acha fóssil de superpredador gaúcho com 220 milhões de anos
(in Portuguese)
Ciência Hoje:A nova fera do Rio Grande do Sul
in Portuguese) Prehistoric probainognathians Prehistoric cynodont genera Monotypic prehistoric animal genera Late Triassic synapsids of South America Fossils of Brazil Triassic Brazil Paleontology in Rio Grande do Sul Santa Maria Formation Fossil taxa described in 2010 {{paleo-therapsid-stub