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SINORNITHOIDES

a meat-eating troodontid theropod dinosaur from the Early Jurassic of China.
sinornithoides
Pronunciation: sie-NOR-nih-THOI-deez
Meaning: Chinese bird form
Author/s: Russell and Dong (1993)
Synonyms: None known
First Discovery: Inner Mongolia, China
Discovery Chart Position: #378

Sinornithoides youngi

Not to be confused with Saurornithoides, a bird like troodontid from Asia, Sinornithoides is... a bird-like troodontid from Asia. Despite both being from the same continent and similar-sounding areas, and of the same type, and bird-like ("oides" means "bird form" in Latin), the latter is the smaller despite being much older and hails from inner Mongolia which is a region of China, while the former was found in outer Mongolia, which is a country that gained independance from China in 1921.

Sinornithoides is based on a virtually complete skeleton and relatively small skull with small serrated teeth that a joint Canada/China expedition hauled from Mongolia's Ejinhoro Formation in 1988. With its snout tucked under its left arm, it was discovered in a similar "sleeping" position to its close relative Mei long, and it was found that way sixteen years earlier, though it cunningly avoided being roasted in the feather by stearing clear of active volcanos. Poor old Mei long.
(Young's Chinese bird form)Etymology
Sinornithoides is derived from the Latin "Sinae" (Chinese), and the Greek "ornis" (bird) and "-oides" (like, form), named for its bird-like appearance and discovery in China. The species epithet, youngi, honors Chung Chien Young (aka C.C Young, aka Yang Zhongjian) the "Father of Chinese vertebrate paleontology".
Discovery
The remains of Sinornithoides were discovered in the Ejinhoro Formation at Huamuxiao, Ordos Basin, Inner Mongolia, northern China, by a joint Canadian/Chinese expeditions in 1988.
The holotype (IVPP V9612) is an almost complete skeleton.
Estimations
Timeline:
Era: Mesozoic
Epoch: Early Jurassic
Stage: Barremian
Age range: 130-125 mya
Stats:
Est. max. length: 1.1 meters
Est. max. hip height: ?
Est. max. weight: 2.5 Kg
Diet: Carnivore
References
• Russell DA and Dong Z (1993) "A nearly complete skeleton of a new troodontid dinosaur from the Early Cretaceous of the Ordos Basin, Inner Mongolia, People's Republic of China". Canadian Journal of Earth Sciences, 30: 2163-2173. DOI: 10.1139/e93-187
• Currie PJ and Z. Dong Z (2001) "New information on Cretaceous troodontids from the People's Republic of China". Canadian Journal of Earth Sciences, 38(12). DOI: 10.1139/cjes-38-12-1753.
• Zhou Z and Hou L (2002) "The discovery and study of Mesozoic birds in China". In Chiappe and Witmer (eds.) "Mesozoic Birds: Above the Heads of Dinosaurs".
• Xu X and Norell MA (2004) "A new troodontid dinosaur from China with avian-like sleeping posture". Nature, 431: 838–841. DOI: 10.1038/nature02898.
• Long J and Schouten P (2009) "Feathered Dinosaurs: The Origin of Birds".
• Paul GS (2010) "The Princeton Field Guide to Dinosaurs".
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To cite this page:
Atkinson, L. "SINORNITHOIDES :: from DinoChecker's dinosaur archive".
›. Web access: 06th Mar 2026.
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