Xunmenglong fossil map
Where fossils of Xunmenglong have been found, shown on the Earth as it looked about 130 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 130 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 | Theropods |
|---|---|
| Lived | 132.6–125.77 million years ago (Hauterivian) |
| Periods | Cretaceous |
| Family | Compsognathidae |
| Named by | Xing et al. 2020 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | China |
| Rock formations | Huajiying |
About Xunmenglong
Xunmenglong (from Chinese: 迅猛龍/迅猛龙; pinyin: Xùnměnglóng; lit. 'swift fierce dragon') is a genus of compsognathid theropod dinosaur from the Huajiying Formation of Hebei Province, China. The type and only species is Xunmenglong yinliangis. The holotype material consists of a pelvis, tail base and hindlimbs that had previously been part of a chimera containing three different animals. The animal is described as being the smallest known member of Compsognathidae, being about the size of the sub-adult Scipionyx holotype specimen, or approximately 50 centimetres (1.6 ft) in length.
Text in “About” is quoted from the Wikipedia article Xunmenglong (revision 1344245462), 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: Q72546177.
