title: Ecteniniidae
text: # Ecteniniidae
  
  Ecteniniidae is an extinct family of probainognathian cynodonts from the Triassic of South America. They are notable for their large size, as well as for being among the first synapsids with specializations towards cursoriality.
  
  ## Phylogeny
  
  Below is a cladogram from Martínez et al. (2013):
  
  