Ectoconus fossil map
Where fossils of Ectoconus have been found, shown on the Earth as it looked about 66 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 66 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 | 66–61.66 million years ago (Danian) |
| Periods | Paleogene |
| Family | Periptychidae |
| Named by | Cope 1884 |
| Fossil records | 68 occurrences at 13 locations (PBDB) |
| Found in | United States, China |
| Rock formations | Denver, North Horn, Nacimiento, Ferris, txn:42266, Shanghu |
About Ectoconus
Ectoconus (Greek: "outside" (ektos), "cone" (konos)) is an extinct genus of terrestrial herbivorous mammal of the family Periptychidae, endemic to North America during the Early Paleocene subepochs (66—63.3 mya) existing for approximately 2.7 million years. Its skull is about 16 cm in length.
Text in “About” is quoted from the Wikipedia article Ectoconus (revision 1354824260), 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: Q2149327.
