[D] Yuanmousaurus jiangyiensis [sG] [T]
Describer
Lü, Li, Ji, Wang, Zhang and Dong, 2006
Time
Jurassic Middle
Classification
Saurischia Sauropodomorpha Sauropoda Euhelopodidae
Diet
Herbivore
Fossilsite
Zhanghe Formation, Jiangyi, Yuanmou County of Yunnan Province, China
Length
Estimated at 17 meters
Info
Genus - Typespecies
Yuanmousaurus jiangyiensis gen. et sp. nov. is erected based on an incomplete skeleton. It is characterized by more complex structures of the neural arches in the dorsal vertebrae than those in Omeisaurus, but less complex than those of Euhelopus; the dorsal vertebra bears 9 laminae, forming three cavities on the lateral surface of the neural arch; the dorsal vertebral neural spines with dorsoventrally-oriented cavities are similar to those of Omeisaurus and Patagosaurus. Yuanmousaurus is more primitive than Euhelopus, but more derived than Omeisaurus. The similar dorsal vertebral structure between Yuanmousaurus and Patagosaurus may indicate that they have a close relationship to each other.
Etymology
The generic name refers to the Chinese administrative unit Yuanmou, which the holotype locality, Jiangyi refers to the holotype locality.
Holotype
An incomplete skeleton without skull, including an antertior part of a cervical vertebra, 9 dorsal vertebrae, two and a half posterior sacral vertebrae, 7 caudal vertebrae, both almost complete scapulae, one nearly complete right humerus, right ulna and radius, partial right ilium, one right complete femur, one right tibia and fibula, one astragalus, one ungual and other bone fragments. The specimen is housed at the Yuanmou Museum, registered No. YMV 601.
Lü, Li, Ji, Wang, Zhang and Dong, 2006
Time
Jurassic Middle
Classification
Saurischia Sauropodomorpha Sauropoda Euhelopodidae
Diet
Herbivore
Fossilsite
Zhanghe Formation, Jiangyi, Yuanmou County of Yunnan Province, China
Length
Estimated at 17 meters
Info
Genus - Typespecies
Yuanmousaurus jiangyiensis gen. et sp. nov. is erected based on an incomplete skeleton. It is characterized by more complex structures of the neural arches in the dorsal vertebrae than those in Omeisaurus, but less complex than those of Euhelopus; the dorsal vertebra bears 9 laminae, forming three cavities on the lateral surface of the neural arch; the dorsal vertebral neural spines with dorsoventrally-oriented cavities are similar to those of Omeisaurus and Patagosaurus. Yuanmousaurus is more primitive than Euhelopus, but more derived than Omeisaurus. The similar dorsal vertebral structure between Yuanmousaurus and Patagosaurus may indicate that they have a close relationship to each other.
Etymology
The generic name refers to the Chinese administrative unit Yuanmou, which the holotype locality, Jiangyi refers to the holotype locality.
Holotype
An incomplete skeleton without skull, including an antertior part of a cervical vertebra, 9 dorsal vertebrae, two and a half posterior sacral vertebrae, 7 caudal vertebrae, both almost complete scapulae, one nearly complete right humerus, right ulna and radius, partial right ilium, one right complete femur, one right tibia and fibula, one astragalus, one ungual and other bone fragments. The specimen is housed at the Yuanmou Museum, registered No. YMV 601.