Seeleyosaurus fossil map
Where fossils of Seeleyosaurus have been found, shown on the Earth as it looked about 190 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 190 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 | Plesiosaurs & kin |
|---|---|
| Lived | 184.2–182.9 million years ago (Toarcian) |
| Periods | Jurassic |
| Family | Microcleididae |
| Named by | White 1940 |
| Fossil records | 2 occurrences at 1 locations (PBDB) |
| Found in | Germany |
| Rock formations | Posidonia Shale |
About Seeleyosaurus
Seeleyosaurus is an extinct genus of plesiosaur from Germany and possibly also Russia.
Two species were known: the type, S. guilelmiimperatoris, and the now obsolete species S. holzmadensis, which has since been absorbed into S. guilelmiimperatoris.
Text in “About” is quoted from the Wikipedia article Seeleyosaurus (revision 1355399385), 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: Q7445837.
