Phascolotherium fossil map
Where fossils of Phascolotherium have been found, shown on the Earth as it looked about 160 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 160 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 | 168.2–165.3 million years ago (Bathonian) |
| Periods | Jurassic |
| Family | Amphilestidae |
| Named by | Owen 1838 |
| Fossil records | 8 occurrences at 4 locations (PBDB) |
| Found in | United Kingdom |
| Rock formations | Taynton Limestone, Forest Marble, txn:39754, White Limestone |
About Phascolotherium
Phascolotherium is a genus of extinct eutriconodont mammal from the Middle Jurassic of the United Kingdom. Found in the Stonesfield Slate, it was one of the first Mesozoic mammals ever found and described, although like the other mammal jaws found at the same time, it was mistakenly thought at first to be a marsupial.
Text in “About” is quoted from the Wikipedia article Phascolotherium (revision 1326303003), 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: Q27468430.