Kronokotherium fossil map
Where fossils of Kronokotherium have been found, shown on the Earth as it looked about 15 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 15 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 | 27.3–5.333 million years ago (Chattian to Messinian) |
| Periods | Paleogene, Neogene |
| Named by | Pronina 1957 |
| Fossil records | 6 occurrences at 3 locations (PBDB) |
| Found in | United States, Russia |
| Rock formations | Pysht, Clallam, txn:NF |
About Kronokotherium
Kronokotherium is an extinct herbivorous marine mammal of the family Desmostylidae in the order Desmostylia.
Its type locality is Raktinskaya, Kamchatka Peninsula, Russia (55.0°N 161.6°E / 55.0; 161.6, paleocoordinates 55.7°N 163.0°E / 55.7; 163.0).
Kronokotherium was made a separate genus because the specimen differs from Desmostylus in the arrangement of the major molar cusps and its smaller size, but it has been synonymized with Desmostylus by most authors.
Text in “About” is quoted from the Wikipedia article Kronokotherium (revision 1354740313), 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: Q6438953.
