Sulcusuchus fossil map
Where fossils of Sulcusuchus have been found, shown on the Earth as it looked about 66 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 66 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 | 83.6–66 million years ago (Campanian to Maastrichtian) |
| Periods | Cretaceous |
| Family | Polycotylidae |
| Named by | Gasparini and Spalletti 1990 |
| Fossil records | 4 occurrences at 4 locations (PBDB) |
| Found in | Argentina |
| Rock formations | La Colonia, Los Alamitos |
About Sulcusuchus
Sulcusuchus is a genus of polycotylid plesiosaur from the Maastrichtian of Argentina.
Text in “About” is quoted from the Wikipedia article Sulcusuchus (revision 1380567447), 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: Q16745564.