Jaekelopterus
Jaekelopterus is an extinct genus of eurypterids from the Lower Devonian period.
Jaekelopterus Media
Illustration of the holotype specimen of "Pterygotus rhenaniae", a pretelson, by Otto Jaekel, 1914
Fossil of J. rhenaniae at the Mineralientage München
Fossilised exocones (the cone-shaped lens-cylinders which make up the compound eye) of J. rhenaniae.