Species-level synonyms of "Cynognathus crateronotus" include "Cistecynodon parvus", "Cynidiognathus broomi", "Cynidiognathus longiceps", "Cynidiognathus merenskyi", "Cynognathus beeryi", "Cynognathus minor", "Cynognathus platyceps", "Cynogomphius berryi", "Karoomys browni", "Lycaenognathus platyceps", "Lycochampsa ferox", "Lycognathus ferox", and "Nythosaurus browni".
Синонимы уровне видов из "Cynognathus crateronotus" включают "Cistecynodon parvus Cynidiognathus broomi, Cynidiognathus longiceps, Cynidiognathus merenskyi, Cynognathus beeryi, Cynognathus minor, Cynognathus platyceps, Cynogomphius berryi, Karoomys browni, Lycaenognathus platyceps, Lycochampsa ferox, Lycognathus ferox" и "Nythosaurus browni.