Eurycleidus fossil map
Where fossils of Eurycleidus 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 | 201.4–184.2 million years ago (Hettangian to Pliensbachian) |
| Periods | Jurassic |
| Family | Rhomaleosauridae |
| Named by | Andrews 1922 |
| Fossil records | 4 occurrences at 4 locations (PBDB) |
| Found in | United Kingdom |
| Rock formations | txn:100163, Blue Lias |
About Eurycleidus
Eurycleidus is an extinct genus of large-bodied rhomaleosaurid known from the Early Jurassic period (most likely earliest Hettangian stage) of the United Kingdom. It contains a single species, E. arcuatus.
Text in “About” is quoted from the Wikipedia article Eurycleidus (revision 1314137488), 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: Q3616157.
