Alexeyisaurus fossil map
Where fossils of Alexeyisaurus have been found, shown on the Earth as it looked about 215 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 215 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 | 227.3–211.18 million years ago (Norian) |
| Periods | Triassic |
| Family | Elasmosauridae |
| Named by | Sennikov and Arkhangelsky 2010 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | Russia |
| Rock formations | Wilczek |
About Alexeyisaurus
Alexeyisaurus is an extinct genus of possible plesiosaur known from the upper Triassic (lower-middle Norian age) of Wilczek Formation, Wilczek Land, of Franz Josef Land, Russia. It was first named by A. G. Sennikov and M. S. Arkhangelsky in 2010 and the type species is Alexeyisaurus karnoushenkoi. While considered an elasmosaur in the initial publication, it has been described as a "partial, poorly preserved, and undiagnostic sauropterygian skeleton" in subsequent publications.
Text in “About” is quoted from the Wikipedia article Alexeyisaurus (revision 1316679860), 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: Q3610868.
