Protorosaurus

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iProtorosaurus
Fossil range: Late Permian
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Infraclass: Archosauromorpha
Order: Prolacertiformes
Family: Protorosauridae
Lydekker, 1888
Genus: Protorosaurus
Binomial name
Protorosaurus speneri
von Meyer, 1830
Protorosaurus
Translation first lizard
Type basal archosaur
Length 6 ft 8 in (2 m)
Movement quadruped
Age 250 million years ago
Diet carnivore
Distribution Germany

Protorosaurus, a lizard-like reptile of the order Prolacertiformes, is the earliest known archosauromorph. It lived during the Late Permian period in Germany, and grew up to 2 meters (6 feet) in length.

In 1914, a new ceratopsian dinosaur found by Lawrence Lambe was again given the name Protorosaurus (in this sense meaning "before Torosaurus"). When Lambe found that the name had already been used for the early archosauromorph, he re-named his ceratopsian to Chasmosaurus.