Shuangmiaosaurus fossil map
Where fossils of Shuangmiaosaurus have been found, shown on the Earth as it looked about 100 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 100 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Iguanodonts & duck-bills |
|---|---|
| Lived | 106.3–100.5 million years ago (Albian) |
| Periods | Cretaceous |
| Named by | You et al. 2003 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | China |
| Rock formations | Sunjiawan |
About Shuangmiaosaurus
Shuangmiaosaurus is a genus of herbivorous iguanodontian ornithopod dinosaur which lived in China during the Late Cretaceous Period, about 100 million years ago.
The type species, Shuangmiaosaurus gilmorei, was named and described by You Hailu, Ji Qiang Li Jinglu and Li Yinxian in 2003. The generic name refers to the village of Shuangmiao in Beipiao in Liaoning Province, the site of the discovery. The specific name honours the American paleontologist Charles Whitney Gilmore.
The holotype, specimen LPM 0165, was found in the Sunjiawan Formation dating to the Late Cretaceous (Cenomanian). It consists of a partial left upper jaw and lower jaw, including the maxilla, part of the premaxilla, elements of the lacrimal and the dentary. It was a rather large ornithopod, estimated at 7.5 metres (25 ft) in length and 2.5 tonnes (2.5 long tons; 2.8 short tons) in body mass.
Shuangmiaosaurus was originally considered a basal member of the Hadrosauroidea, one closely related to the Hadrosauridae. Subsequent authors, including David B. Norman of Cambridge University, consider it a more basal member of the Iguanodontia outside of the Hadrosauroidea.
Text in “About” is quoted from the Wikipedia article Shuangmiaosaurus (revision 1359765888), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q28554416.
