Temporal range: Middle Jurassic,
|Holotype, Paleozoological Museum of China|
Cheng et al., 2012
Cheng et al, 2012
Jianchangnathus was first described and named by Cheng Xin, Wang Xiaolin, Jiang Shunxing and Alexander W.A. Kellner in 2012 and the type species is Jianchangnathus robustus. The generic name combines a reference to Jianchang County with a Greek γνάθος, gnathos, "jaw". The specific name means "robust" in Latin.
Autapomorphies of Jiangchangnathus include: a convex top margin of the lower jaw; a large front branch of the jugal; and the first three pairs of teeth of the lower jaws pointing strongly forwards. Its describers found it to share several features with Scaphognathus, including a high front end of the lower jaws, a pear-shaped lower temporal fenestra with the broad end below and teeth in the maxilla of the upper jaw that have a space equal to that of three toothsockets between them. Additionally, undescribed fossils of a pterosaur referred to Jianchangnathus suggest that the color of its pycnofibers was brown.
- Xin Cheng; Xiaolin Wang; Shunxing Jiang; Alexander W.A. Kellner (2012). "A new scaphognathid pterosaur from western Liaoning, China". Historical Biology. 24: 101–111. doi:10.1080/08912963.2011.635423. S2CID 128539358.
- Li, Q., J.A. Clarke, K.-Q. Gao, C.-F. Zhou, Q. Meng, D. Li, L. D'Alba, and M.D. Shawkey. 2014. Melanosome evolution indicates a key physiological shift within feathered dinosaurs. Nature 507: 350-353.