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Parasaniwa

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Extinct genus of lizards
Parasaniwa
Temporal range: Late Cretaceous, Maastrichtian
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Anguimorpha
Family: Palaeovaranidae
Genus: Parasaniwa
Gilmore, 1928
Type species
Parasaniwa wyomingensis
Gilmore, 1928
Synonyms
  • Parasaniwa obtusa Gilmore, 1928

Parasaniwa is an extinct genus of necrosaurid lizard from the Late Cretaceous of the western United States.[1]

Description

[edit ]

It was named in 1928 by Charles W. Gilmore for jaw and skull bones found in the Lance Formation and Hell Creek Formation of Wyoming and Montana. Gilmore also named the species P. obtusa in 1928, but it is now considered a junior synonym, separated by features caused by erosion. Additional specimens were referred to Parasaniwa from the Lower Eocene Bridger Formation, but additional material from the Wasatch Formation instead suggests that this belongs to a separate genus Parasaniwa is considered closely related to Necrosaurus as a member of Necrosauridae, though it has at times been kept in a separate family Parasaniwidae.[1]

References

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  1. ^ a b Estes, R. (1983). "Part 10A. Sauria terrestria, Amphisbaenia". In Kuhn, O. (ed.). Handbuch der Palaoherpetologie. Gustav Fischer Verlag. pp. 172–174.
Extinct squamate genera
Acrodonta
Agamidae
Pleurodonta / Iguanoidea
Corytophanidae
Gobiguania
Iguanidae
Phrynosomatidae
Other extinct iguanians
Arretosauridae
Priscagamidae
Chamopsiidae
Gilmoreteiidae / "macrocephalosaurines"
"Polyglyphanodontines"
Other polyglyphanodontians
Scincogekkonomorpha
Scleroglossa
Gekkonomorpha
Gekkota
Stem Autarchoglossa
(Evansauria)
Bainguidae?
Cordyloidea
Lacertoidea
Amphisbaenia
Amphisbaenidae
Bipedidae
Blanidae
Chthonophidae
Rhineuridae
Polyodontobaenidae
Contogeniidae
Lacertidae
Teiidae
Barbatteiidae
Xantusiidae
Scincoidea
Scincidae
Other scincomorphs
Paramacellodidae
Basal anguimorphs
Mosasauria?
Neoanguimorpha
Carusioidea
Xenosauridae
Anguidae
Anguinae
Diploglossinae
Gerrhonotinae
Glyptosaurinae
Paleoanguimorpha
Basal varanoids / platynotans
Shinisauria?
Goannasauria
Basal goannasaurians
Varanoidea
Lanthanotidae
Varanidae
Other platynotans / varanoids
Indeterminate squamates


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