Campylocephalus is a genus of prehistoric eurypterid

Eurypterid

Eurypterids are an extinct group of arthropods related to arachnids which include the largest known arthropods that ever lived. They are members of the extinct order Eurypterida ; which is the most diverse Paleozoic chelicerate order in terms of species...

 of the Family Hibbertopteridae.

Description

Campylocephalus is distinguished by its prosoma (head), which is subsemicircular and strongly convex, with subcentral compound eyes separated by inflated lobes. Its abdominal tergites are convex, with articular processes. Its appendages are almost unknown.

Species

• Campylocephalus Eichwald, 1860
  • C. oculatus (Kutorga, 1852) — Permian
    Permian
    The PermianThe term "Permian" was introduced into geology in 1841 by Sir Sir R. I. Murchison, president of the Geological Society of London, who identified typical strata in extensive Russian explorations undertaken with Edouard de Verneuil; Murchison asserted in 1841 that he named his "Permian...
    
    , Russia
  • ?C. salmi Stur, 1877 — Carboniferous
    Carboniferous
    The Carboniferous is a geologic period and system that extends from the end of the Devonian Period, about 359.2 ± 2.5 Mya , to the beginning of the Permian Period, about 299.0 ± 0.8 Mya . The name is derived from the Latin word for coal, carbo. Carboniferous means "coal-bearing"...
    
    , Czech Republic