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PHAEDROLOSAURUS

a meat-eating theropod dinosaur from the Early Cretaceous of China.
Pronunciation: fee-droh-lo-SOR-us
Meaning: Nimble lizard
Author/s: Dong (1973)
Synonyms: None known
First Discovery: Xinjiang, China
Chart Position: 32

Phaedrolosaurus ilikensis

Based on a single tooth — similar to those of Dromaeosaurus but thicker, shorter, and more robust, by all accounts — renowned Chinese paleontologist Zhiming Dong named Phaedrolosaurus and managed to assign a right leg to it from an entirely different locality. On top of that, many experts reckon the tooth hails from the Lianmugin Formation of Wuerho, yet the species name chosen by Dong honors the Ilike Formation. It's not looking good already.

As far as fossilized legs go, the leg of Phaedrolosaurus was quite a good one, with several diagnostic and distinct features of the tibia and fibula (shin and calf) which sets it apart from all known theropods. It appears to belong to a coelurosaur, possibly a maniraptoran, or may be a relative of the Asian theropod Bagaraatan. Unfortunately, it no longer belongs to Phaedrolosaurus, because Oliver Rauhut and Xing Xu used it to anchor a new species of dinosaur — Xinjiangovenator — in 2005, which left Phaedrolosaurus attached to a solitary tooth and thus a nomen dubium.
Etymology
Phaedrolosaurus is derived from the Ancient Greek "phaidros" (bright) and the Greek "sauros" (lizard), referring to this critter's assumed nimbleless and agility.
The species epithet, ilike, refers to the Ilike Formation.
Discovery
The first remains of Phaedrolosaurus were discovered in the Lianmugin Formation of Wuerho, Xinjiang, China, during an Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) expedition to China's Wuerho area in 1964.
Zhiming Dong described it but never did pluck a holotype from his hotch potch of remains, so Hans-Dieter Sues made its single thirty-one millimetre long tooth the lectotype (IVPP V 4024-1) in 1977.
Estimations
Timeline:
Era: Mesozoic
Epoch: Early Cretaceous
Stage: Aptian-Albian
Age range: Uncertain
Stats:
Est. max. length: 7 meters
Est. max. hip height: ?
Est. max. weight: ?
Diet: Herbivore
Family Tree:
Dinosauria
Saurischia
Theropoda
Phaedrolosaurus
ilikensis
References
• Zhiming Dong (1973) "Dinosaurs from Wuerho".
• Oliver W. M. Rauhut and Xing Xu (2005) "The Small Theropod Dinosaurs Tugulusaurus and Phaedrolosaurus from the Early Cretaceous of Xinjiang, China".
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To cite this page:
Atkinson, L. "PHAEDROLOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 26th Jun 2017.
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