Hastanectes fossil map
Where fossils of Hastanectes have been found, shown on the Earth as it looked about 130 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 130 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 | 139.1–132.6 million years ago (Berriasian to Valanginian) |
| Periods | Cretaceous |
| Family | Leptocleididae |
| Named by | Benson et al. 2013 |
| Fossil records | 6 occurrences at 6 locations (PBDB) |
| Found in | United Kingdom, Germany |
| Rock formations | Wadhurst Clay, Bückeberg |
About Hastanectes
Hastanectes is an extinct genus of a plesiosaurian with possible pliosaurid affinities known from the Early Cretaceous Wadhurst Clay Formation (Valanginian stage) of the United Kingdom. It contains a single species, Hastanectes valdensis, which was originally thought to be a species of Cimoliasaurus.
Text in “About” is quoted from the Wikipedia article Hastanectes (revision 1149515972), 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: Q868529.