Jaekelopterus (Prehistoric World by CollectA)5 (7)
The genus Jaekelopterus contains two species from the Early Devonian; fossils of J. rhenaniae were originally discovered in the Rhineland of Western Germany while those of J. howellii were originally discovered in Wyoming, USA. Jaekelopterus rhenaniae is not only the largest eurypterid, it is the largest known arthropod…EVER! Using a chelicera (claw) as a metric, J. rhenaniae was estimated as...