The atlas shows a 479–250 Ma reviewed eurypterid fossil-record envelope from the oldest unequivocal Fezouata material to Tetlie's reviewed latest record, not an origination or extinction interval.
claim:taxon:eurypterida:fossil-rangeDistribution and dispersal history of Eurypterida (Chelicerata)
Tetlie, O.E.
Year2007
Source rolesystematic-review
DOI / ID10.1016/j.palaeo.2007.05.011
Fitness and scope
taxonomy · range · biogeography
Systematic distribution review records a Late Permian Russian occurrence at approximately 250 Ma while noting incomplete taxonomy and sampling.
Claim ledger
Van Roy et al. place unequivocal Fezouata sea scorpions in a sampled eurypterid morphology matrix, while Tetlie reviews historical distribution; classification remains a sampled, revisable hypothesis rather than a final order-wide tree.
claim:taxon:eurypterida:taxonomyFezouata and Late Permian Russian occurrences in Van Roy et al. and Tetlie provide bounded localities across time; they do not constitute a complete geographic distribution of Eurypterida.
claim:taxon:eurypterida:biogeographyThe cited eurypterid studies address morphology, phylogenetic placement and fossil distribution; predatory function, habitat preference, locomotor performance, body size and ecological guild remain study-limited and unassigned here.
claim:taxon:eurypterida:ecology