Eurypterida
sea scorpions, eurypterids
Family Guides
1- Eurypteridae(sea scorpions)
Eurypterida is an extinct order of aquatic chelicerate arthropods commonly known as sea . They ranged from the Cambrian through the Permian periods, with their main diversification occurring during the Paleozoic. The group includes both marine and freshwater , with body sizes ranging from a few centimeters to over two meters in some species. Eurypterids are characterized by a segmented body with a prosoma and opisthosoma, paired swimming paddles, and a terminal spine. They represent one of the largest groups in the fossil record and are significant for understanding early chelicerate evolution.
Pronunciation
How to pronounce Eurypterida: //juːˈrɪptərɪdə//
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Habitat
Marine and freshwater aquatic environments during the Paleozoic Era. Fossil evidence indicates occupation of shallow coastal waters, estuaries, and freshwater basins. Some show adaptations suggesting amphibious capabilities.
Distribution
Global distribution during the Paleozoic, with documented fossil occurrences in Eastern Canada, Arctic Canada, Morocco, and numerous other localities worldwide. Early Ordovician fossils from Morocco indicate Cambrian origins of the group.
Sources and further reading
- BugGuide
- Canadian fossil ostracoda conchostraca eurypterida, and phyllocarida
- Distribution and dispersal history of Eurypterida (Chelicerata)
- Recent publications on the origin and habitat of the Eurypterida
- Early Ordovician sea scorpions from Morocco suggest Cambrian origins and main diversification of Eurypterida.