Baiyinosaurus

Baiyinosaurus (meaning "Baiyin reptile") is an extinct genus of stegosaurian dinosaurs from the Middle Jurassic Wangjiashan Formation of China. The genus contains a single species, B. baojiensis, known from a partial skeleton including cranial bones. The skeletal anatomy of Baiyinosaurus demonstrates transitional features between basal thyreophorans and stegosaurs. While many stegosaurs are known from China, Baiyinosaurus is the only one currently named from Gansu Province.

== Discovery and naming == thumb|left|Type locality (biology)|Type locality in Gansu Province, China The Baiyinosaurus holotype specimen, IVPG-D021, was discovered in 2016 by Li Daqing and his crew during excavations in sediments of the Wangjiashan Formation (Straw-yellow Sandstone Member). These outcrops are in the Pingchuan District of the city of Baiyin in Gansu Province, China. Following their discovery, the bones were collected and prepared by the Gansu Zhendan Dinosaur Culture Communication Co. Ltd., and reposited at Gansu Agricultural University.