Arminisaurus fossil map
Where fossils of Arminisaurus 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 | 192.9–184.2 million years ago (Pliensbachian) |
| Periods | Jurassic |
| Family | Pliosauridae |
| Named by | Sachs and Kear 2017 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | Germany |
| Rock formations | Amaltheenton |
About Arminisaurus
Arminisaurus (meaning "lizard of Arminius") is a genus of pliosaurid plesiosaur that lived during the Lower Jurassic in present-day Germany. With Westphaliasaurus and Cryonectes, Arminisaurus is only the third plesiosaurian taxon that was described from the Pliensbachian stage. The holotype and only known specimen is a fragmentary skeleton (about 40 percent complete), comprising an incomplete lower jaw, teeth, vertebrae and elements from the pectoral girdle and the paddles. The animal had an estimated body length of 3–4 metres (9.8–13.1 ft).
Text in “About” is quoted from the Wikipedia article Arminisaurus (revision 1283156489), 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: Q42350370.