Tinodon fossil map
Where fossils of Tinodon have been found, shown on the Earth as it looked about 145 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 145 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 | 154.8–139.1 million years ago (Kimmeridgian to Berriasian) |
| Periods | Jurassic, Cretaceous |
| Family | Tinodontidae |
| Named by | Marsh 1879 |
| Fossil records | 10 occurrences at 3 locations (PBDB) |
| Found in | United States, United Kingdom, Portugal |
| Rock formations | Morrison, Lulworth, Lourinhã |
About Tinodon
Tinodon is an extinct genus of mammal. First described by the paleontologist Othniel Charles Marsh, it contains two recognized species: Tinodon bellus and T. micron. It is known from jaw and dental remains. Its taxonomic placement within the mammalian lineage remains uncertain, having been variously placed within and outside of the crown group Mammalia. It lived from the Late Jurassic to the Early Cretaceous, found in both North America and Europe. Its known habitats are believed to have ranged from semi-arid to arid.
Text in “About” is quoted from the Wikipedia article Tinodon (revision 1356296373), 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: Q7808425.
