English Eurypterid Cited by user Citation bot on 26 Nov 2020 Eurypterids, often informally called sea scorpions, are a group of extinct arthropods that form the order Eurypterida.
English Salteropterus Cited by user Ichthyovenator on 21 Mar 2018 Salteropterus is a genus of eurypterid, an extinct group of aquatic arthropods. Fossils of Salteropterus have been discovered in deposits of Late Silurian age in Britain.