Maresaurus fossil map
Where fossils of Maresaurus have been found, shown on the Earth as it looked about 175 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 175 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 | 170.9–168.6 million years ago (Bajocian) |
| Periods | Jurassic |
| Family | Rhomaleosauridae |
| Named by | Gasparini 1997 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | Argentina |
| Rock formations | Los Molles |
About Maresaurus
Maresaurus is an extinct genus of plesiosaur from the Middle Jurassic (Bajocian) Los Molles Formation of Argentina. The type species, Maresaurus coccai, was named by Gasparini in 1997. Recent phylogenetic analysis found Maresaurus to be a rhomaleosaurid.
Text in “About” is quoted from the Wikipedia article Maresaurus (revision 1367193533), 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: Q3390438.
