Mongolostegus fossil map
Where fossils of Mongolostegus have been found, shown on the Earth as it looked about 115 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 115 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 | Stegosaurs & ankylosaurs |
|---|---|
| Lived | 121.4–100.5 million years ago (Aptian to Albian) |
| Periods | Cretaceous |
| Family | Stegosauridae |
| Named by | Tumanova and Alifanov 2018 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | Mongolia |
| Rock formations | Dzunbain |
About Mongolostegus
Mongolostegus (meaning "Mongolian roof") is an extinct genus of stegosaurian dinosaurs from the Early Cretaceous (Aptian–Albian ages) Dzunbain Formation of Mongolia. The genus contains a single species, Mongolostegus exspectabilis, known from a fragmentary single specimen representing the first stegosaur named from Mongolia. It is one of the youngest known stegosaurs, along with Yanbeilong and an unnamed species from the Hekou Group of China. In contrast to these taxa, which are members of the late-diverging stegosaur subfamily Stegosaurinae, Mongolostegus may have affinities to more basal taxa such as the Huayangosauridae.
Text in “About” is quoted from the Wikipedia article Mongolostegus (revision 1325613057), 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: Q61732137.
