Ecteniniidae

Ecteniniidae is an extinct family of probainognathian cynodonts from the Triassic of South America.^[1] They are notable for their large size,^[1][2] as well as for being among the first synapsids with specializations towards cursoriality.^[3]

Ecteniniidae Temporal range: Late Triassic, Norian PreꞒ Ꞓ O S D C P T J K Pg N
Life restoration of the ecteniniid Trucidocynodon riograndensis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	Cynodontia
Clade:	Probainognathia
Family:	†Ecteniniidae Martínez et al., 2013
Genera
†Diegocanis †Ecteninion †Trucidocynodon

Phylogeny

Below is a cladogram from Martínez et al. (2013):^[1]

Cynodontia	Procynosuchus Galesaurus Thrinaxodon Platycraniellus Eucynodontia Cynognathia Probainognathia Lumkuia Chiniquodon Probainognathus Ecteniniidae Diegocanis Ecteninion Trucidocynodon Prozostrodontia Prozostrodon Therioherpeton Tritylodontidae Oligokyphus Tritylodon Bienotherium Kayentatherium Pachygenelus Riograndia Brasilodon Mammaliaformes Adelobasileus Sinoconodon Morganucodon