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Temporal range: Early Cretaceous[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Rhynchocephalia
Suborder: Sphenodontia
(unranked): Opisthodontia
Tribe: Eilenodontini
Genus: Toxolophosaurus Olson, 1960[1][2]
  • T. cloudi (type) Olson, 1960[2]

Toxolophosaurus was a Sphenodontid from the Early Cretaceous-age Kootenai Formation of Montana.[3]


Toxolophosaurus cloudi was found by Olson in 1960[2] in the Kootenai Formation, 223.75 feet above the base of the Kootenai.[3]


Toxolophosaurus was placed in Sphenodontidae by Michael Benton in 1985.[4] It is closely related to Priosphenodon and Eilenodon.


Toxolophosaurus was herbivorous.[1]

See also[edit]


  1. ^ a b c Throckmorton, Gaylord S.; Hopson, James A.; Parks, Peter (1981). "A redescription of Toxolophosaurus cloudi Olson, a Lower Cretaceous herbivorous sphenodontid reptile". Journal of Paleontology. 55 (3): 586–597. JSTOR 1304272. 
  2. ^ a b c "†Toxolophosaurus Olson 1960". Paleobiology Database. Fossilworks. Retrieved 20 February 2017. 
  3. ^ a b Everett C. Olson (May 1960). "A Trilophosaurid Reptile from the Kootenai Formation (Lower Cretaceous)". Journal of Paleontology. 34 (3): 551–555. JSTOR 1300954. 
  4. ^ "Taxonomic opinions tied to this reference: M. J. Benton 1985". Paleobiology Database. Fossilworks. Retrieved 20 February 2017.