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meaning: "Dawn Chinese wing"
Named By: P. Godefroit, H. Demuynck, G. Dyke, D. Hu, F. O. Escuillie & P. Claeys in 2013
Time Period: Late Jurassic, 160 Ma
Location: China, Liaoning Province - Tiaojishan Formation
Size: About 30 centimetres long
Diet: Insectivore/Carnivore
Fossil(s): Almost complete individual
Classification: | Chordata | Reptilia | Dinosauria | Saurischia | Theropoda | Deinonychosauria | Troodontidae |

Eosinopteryx is an extinct genus of theropod dinosaurs known the late Jurassic period of China. It contains a single species, Eosinopteryx brevipenna.

E. brevipenna is known from a single fossil specimen recovered from the Tiaojishan Formation of western Liaoning Province, China, which has been dated to the late Jurassic period (Oxfordian age), about 160 million years ago. The name Eosinopteryx is derived from the Greek eos ("daybreak" or "dawn"), the Latin Sinae ("Chinese"), and the Greek pteryx ("feather"). The specific name brevipenna (from the Latin brevis, "short", and penna, "feather") refers to the reduced plumage preserved in the type specimen, YFGP-T5197.

Though initially classified as a troodontid, a more comprehensive analyses of its relationships have found it to be either a primitive paravian or an avialan.

Read more about Eosinopteryx at Wikipedia
PaleoCodex is a weekend hack by Saurav Mohapatra