Adriosaurus

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Adriosaurus
Temporal range: Late Cretaceous, 95Ma
Adriosaurus.jpg
London specimen of A. suessi above, with interpretative drawing of its skull on the left. Vienna holotype specimen of A. suessi below.
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Infraorder: Anguimorpha
(unranked): Pythonomorpha
Genus: Adriosaurus
Seeley, 1881
Species
  • A. microbrachis Palci & Caldwell, 2007[1]
  • A. skrbinensis Caldwell & Palci, 2010[2]
  • A. suessi Seeley, 1881 (type)

Adriosaurus is an extinct genus of aquatic lizard that lived about 95 million years ago. It was snake-like and grew 10 to 12 inches. This is the first fossil record of vestigial limbs in lizards, and gives scientists a glimpse back to the time when terrestrial lizards evolved to be limbless and returned to their watery origins.[3][4]

Cladogram based on Palci and Caldwell (2010a), Caldwell and Palci (2010b)[5][2]

Anguimorpha

Anguidae





Xenosaurus



Shinisaurus





Heloderma





Lanthanotus



Varanus



Pythonomorpha


Aigialosauridae



Mosasauridae



Ophidiomorpha
Dolichosauridae

Coniasaurus



Dolichosaurus






Pontosaurus lesinensis



Pontosaurus kornhuberi





Aphanizocnemus





Adriosaurus skrbinensis



Adriosaurus suessi





Acteosaurus



Ophidia












References[edit]