High Quality Content by WIKIPEDIA articles! Yandangornis was a theropod, possibly a bird, from the Late Cretaceous. It lived 85-74 million years ago in what is now China. The type species, Y. longicaudus, was formally described by Cai and Zhou in 1999. The holotype specimen is in the collection of the Zhejiang Museum of natural History, with accession number M1236. The fossil was discovered in 1986, near Linhai City in Zhejiang Province, China. It includes most of one complete skeleton. The specimen is a small dinosaur, roughly the size of Archaeopteryx, with a total length around 588 millimeters. The head is 50 mm long. It is preserved in a seated position and visible from the ventral aspect. It has a long tail, with traces of tail feathers preserved. It has no teeth and no enlarged 2nd toe claw.

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