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Dolichosaurus Temporal range: Upper Cretaceous

Fossil
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Family:	†Dolichosauridae
Genus:	†Dolichosaurus Owen, 1850
Species
D. longicollis Owen, 1850 (type)

Dolichosaurus (meaning "long lizard") is an extinct genus of marine squamate of the Upper Cretaceous Cenomanian chalk deposits of England. It is a member of the family Dolichosauridae.^[1] It was a small reptile measuring 0.5–1 m (1.6–3.3 ft) long.^[2] It had an elongate neck resulting from an increased number of cervical vertebrae.^[1]

References

^ ^a ^b Michael W. Caldwell. On the aquatic squamate Dolichosaurus longicollis Owen, 1850 (Cenomanian, Upper Cretaceous), and the evolution of elongate necks in squamates. Journal of Vertebrate Paleontology 20(4):720-735. 2000. doi: https://dx.doi.org/10.1671/0272-4634(2000)020[0720:OTASDL]2.0.CO;2
^ Bardet, Nathalie (2008). "The Cenomanian-Turonian (late Cretaceous) radiation of marine squamates (Reptilia): the role of the Mediterranean Tethys". Bulletin de la Société Géologique de France. 179 (6): 605–623. doi:10.2113/gssgfbull.179.6.605.

Varanoidea

Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata

Extant species

Helodermatidae	Chiapan beaded lizard (H. alvarezi) Guatemalan beaded lizard (H. charlesbogerti) Rio Fuerte beaded lizard (H. exasperatum) Mexican beaded lizard (H. horridum) Gila monster (H. suspectum)
Lanthanotus	Earless monitor lizard (L. borneensis)
Varanus	Asian water monitor (V. salvator) Black tree monitor (V. beccarii) Black-headed monitor (V. tristis) Bengal monitor (V. bengalensis) Black-spotted ridge-tailed monitor (V. baritji) Blue-tailed monitor (V. doreanus) Crocodile monitor (V. salvadorii) Desert monitor (V. griseus) Dumeril's monitor (V. dumerilii) Emerald tree monitor (V. prasinus) Gray's monitor (V. olivaceus) Kimberely rock monitor (V. glauerti) Komodo dragon (V. komodoensis) Lace monitor (V. varius) Mangrove monitor (V. indicus) Merten's water monitor (V. mertensi) Mitchell's water monitor (V. mitchelli) Nile monitor (V. niloticus) Northern Sierra Madre forest monitor (V. bitatawa) Peacock monitor (V. auffenbergi) Peach-throated monitor (V. jobiensis) Perentie (V. giganteus) Pygmy mulga monitor (V. gilleni) Quince monitor (V. melinus) Rock monitor (V. albigularis) Pilbara monitor (V. bushi) Rennel Island monitor (V. juxtindicus) Rosenberg's monitor (V. rosenbergi) Roughneck monitor (V. rudicollis) Short-tailed pygmy monitor (V. brevicauda) Spiny-tailed monitor (V. acanthurus) Turquoise monitor (V. caerulivirens) Sand goanna (V. gouldii) Savannah monitor (V. exanthematicus) Yellow monitor (V. flavescens) Yellow-spotted monitor (V. panoptes) Yemen monitor (V. yemenensis)
Related categories	Monitor lizards Cretaceous lizards Helodermatidae

Fossil taxa

†Palaeovaranidae	Palaeovaranus Eosaniwa Paranecrosaurus
Varanidae	Megalania (Varanus priscus) Saniwa Varanus amnhophilis
Others	Arcanosaurus Aiolosaurus Cherminotus Gobiderma Morohasaurus Ovoo Telmasaurus Palaeosaniwa Saniwides Estesia

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