Family Helodermatidae Gray 1837 (lizard)

Reptilia - Squamata - Helodermatidae

Alternative spelling: Helodermidae

Parent taxon: Varanoidea according to R. Estes 1983

See also Baur 1890, Carroll 1988, Cope 1871, Cope 1875, Estes et al. 1988, Frank and Ramus 1996, Gao and Fox 1996, Kuhn 1946, Norell and Gao 1997, Peng et al. 2001 and Seiffert 1975

Sister taxa: Aiolosaurus, Arcanosaurus, Heloderma, Judeasaurus, Ovoo, Pachyvaranidae, Parasaniwidae, Saniwinae, Varanidae

Subtaxa: none

Ecology: ground dwelling carnivore

Distribution:

• Arikareean of United States (1: Florida collection)

• Oligocene of France (3)

• Eocene of Belgium (1), France (4), United States (1: Wyoming)

• Cretaceous of Canada (15: Alberta)

Total: 25 collections including 26 occurrences

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