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Temporal range: Late Triassic
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Order: Therapsida
Suborder: Cynodontia
Family: Ecteniniidae
Genus: Ecteninion
Martínez et al., 1996
Type species
Ecteninion lunensis
Martínez et al., 1996

Ecteninion is a genus of meat-eating cynodont that lived during the Triassic of South America. The type species Ecteninion lunensis was named by R.N. Martinez, C.L. May, and C.A. Forster in 1996. E. lunensis is known from a nearly complete skull of about 11 cm in length. It was found in Carnian (Upper Triassic)-age strata of the Ischigualasto Formation in Argentina. It has been interpreted as a basal eucynodont. The holotype is in the collection of the Universidad Nacional de San Juan.