Shishugou Formation
| Shishugou Formation Stratigraphic range: Middle-Late Jurassic |
|
|---|---|
| Type | Geological formation |
| Sub-units | Wucaiwan Member |
| Underlies | Tugulu Group |
| Overlies | Xishanyao Formation |
| Location | |
| Country |
 China
|
The Shishugou Formation (simplified Chinese: 石树沟组; traditional Chinese: 石樹溝組; pinyin: Shíshùgōu Zǔ) is a geological formation in Xinjiang, China.
Its strata date back to the Late Jurassic period. Dinosaur remains are among the fossils that have been recovered from the formation. (see Junggar Basin dinosaur trap). The Shishugou Formation is considered one of the most phylogenetically and trophically diverse Middle to Late Jurassic theropod fauna.
The Wucaiwan Formation, once considered a separate, underlying formation, is now considered the lowest unit of the Shishugou Formation.
The Shishugou Formation dinosaur traps are a source of fauna fossils.
Undescribed stegosaur is present in the Wucaiwan member. Undescribed ornithopod is present in the Wucaiwan member. Undescribed ankylosaurs present in both upper Shishugou and Wucaiwan members.
"Eugongbusaurus wucaiwanensis"
An unspecified basal ornithopod, previously classified as Gongbusaurus wucaiwanensis. It is estimated at around 1.3 to 1.5 meters (4.3 to 4.9 ft) long.
Jiangjunosaurus junggarensis
A stegosaur reaching around 6 meters (20 feet) in length and weighed 2.5 tonnes. It had three distinguishing traits: the crowns of the teeth are symmetrical and in side view wider than tall; the spine of the axis, the second neck vertebra, has a rectangular profile in side view, instead of a triangular one; and the rear neck vertebrae have large vein openings in their sides.
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