Parioscorpio anatomy and the reassessed scorpion hypothesis
Silurian Parioscorpio fossils were initially interpreted as scorpions; a subsequent redescription rejected that identification, undermining their use as evidence of scorpion terrestrialization.
Represented range437.5–436.5 Ma
RegionsBrandon Bridge Formation, Waukesha, Wisconsin, USA
CladesParioscorpio venator
Claim ledger
ecology · contested
Wendruff et al. (2020) interpreted Parioscorpio venator specimens UWGM 2162 and UWGM 2163 as scorpions and compared medial structures with a pulmonary-cardiovascular system. This claim records that study's terrestrialization hypothesis, not established scorpion anatomy, physiology or habitat.