Monotrematum fossil map
Where fossils of Monotrematum 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 | Ornithorhynchidae |
| Named by | Pascual et al. 1992 |
| Fossil records | 2 occurrences at 1 locations (PBDB) |
| Found in | Argentina |
| Rock formations | Salamanca |
About Monotrematum
Monotrematum sudamericanum is an extinct monotreme species from the Paleocene (Peligran) Salamanca Formation in Patagonia, Argentina. It is one of only two monotremes found outside Oceania.
Text in “About” is quoted from the Wikipedia article Monotrematum (revision 1369046884), 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: Q782618.
