Parviraptor

Parviraptor
Temporal range: Late Jurassic
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Clade: Toxicofera
Clade: Ophidia
Genus: Parviraptor
Evans, 1994
Species:  P. estesi
Binomial name
Parviraptor estesi
Evans, 1994

Parviraptor was a genus of stem-snake (clade Ophidia)[1] containing one species, Parviraptor estesi, from the Late Jurassic (Tithonian) or Early Cretaceous (Berriasian) Purbeck Limestone Formation of Dorset, England.[1] A second species, Parviraptor gilmorei, was described from the Late Jurassic Morrison Formation of Western North America;[2] it was present in stratigraphic zone 4.[3] However, the second species was subsequently transferred to a separate genus Diablophis.[1]

Phylogeny

Cladogram based in the phylogenetic analysis by Caldwell et al. (2015):[1]

Ophidia

Portugalophis



Parviraptor


 

Eophis




Unnamed sp.



Diablophis






Dinilysia




Madtsoiidae




Najash




Coniophis



Serpentes (Modern snakes)







References

  1. 1 2 3 4 Caldwell, M. W.; Nydam, R. L.; Palci, A.; Apesteguía, S. N. (2015). "The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution". Nature Communications 6: 5996. doi:10.1038/ncomms6996.
  2. Foster, J. (2007). "Table 2.1: Fossil Vertebrates of the Morrison Formation." Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press. pp. 58-59.
  3. Foster, J. (2007). "Enneabatrachus hechti" Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press. p. 137.
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