Mongolonyx fossil map
Where fossils of Mongolonyx have been found, shown on the Earth as it looked about 56 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 56 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 | Early mammals |
|---|---|
| Lived | 56–48.07 million years ago (Ypresian) |
| Periods | Paleogene |
| Family | Mesonychidae |
| Named by | Szalay and Gould 1966 |
| Fossil records | 4 occurrences at 2 locations (PBDB) |
| Found in | China |
| Rock formations | Arshanto |
About Mongolonyx
Mongolonyx is an extinct genus of mesonychid that lived from the Early to Middle Eocene in Inner Mongolia (China). M. dolichognathus, the type species, was described by Szalay and Gould (1966). M. dolichognathus fossils have been found in the Irdin Manha beds, in Inner Mongolia. It was a huge carnivorous animal comparable in size to a large bear.
Text in “About” is quoted from the Wikipedia article Mongolonyx (revision 1375704186), 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: Q3755975.
