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Webbed bird footprints from Cretaceous of China



From: Ben Creisler
bcreisler@gmail.com


A new online paper:

Yoichi Azuma, Junchang Lü, Xingsheng Jin, Yoshikazu Noda, Masateru
Shibata, Rongjun Chen & Wenjie Zheng (2012)
A bird footprint assemblage of early Late Cretaceous age, Dongyang
City, Zhejiang Province, China.
Cretaceous Research (advance online publication)
http://dx.doi.org/10.1016/j.cretres.2012.05.003
http://www.sciencedirect.com/science/article/pii/S0195667112000894

A new Cretaceous bird ichnotaxon, Dongyangornipes sinensis ichnogen.
et ichnosp. nov., is described. It is the first record of a webbed
bird footprint in China. It was recovered from the early Late
Cretaceous Jinhua Formation in Dongyang City, Zhejiang Province. It is
characterized by comparatively small tridactyl footprints with a
notably developed web structure without a hallux impression. The web
impression of digits II–III is connected from the apex of digit II to
the posterior third of digit III, whereas that between digits III and
IV is linked from the apex of digit IV to the mid-point of digit III.
Webbed footprints of Cretaceous birds have not been described
previously from outside South Korea. Shorebird footprints without
webbing, referred to Koreanaornis cf. hamanensis, are also present at
the same site. The Dongyang bird footprint site is the southernmost
locality of Mesozoic bird track sites in Asia.