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Temporal range: Early Triassic
Holotype in (A) lateral and (B) posterior views, with (C) a cross section of a tooth
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: Proterosuchidae
Genus: Ankistrodon
Huxley, 1865
Type species
Ankistrodon indicus
Huxley, 1865
  • Epicampodon Lydekker, 1885
  • Epicampodon indicus (Huxley, 1865) Lydekker, 1885
  • Thecodontosaurus indicus (Huxley, 1865) Huene, 1908
  • Chasmatosaurus indicus (Huxley, 1865) Huene, 1942
Distinguished from the snake genus Agkistrodon.

Ankistrodon is an extinct genus of archosauriform known from the Early Triassic Panchet Formation of India. First thought to be a theropod dinosaur, it was later determined to be a proterosuchid. The type species is A. indicus, described by prolific British zoologist Thomas Henry Huxley in 1865. One authority in the 1970s classified Ankistrodon as a senior synonym of Proterosuchus.[1]


  1. ^ Romer, A.S. (1972). "The Chañares (Argentina) Triassic reptile fauna. XVI. Thecodont classification". Breviora 395: 1–24.