Flexicalymene retrorsa trilobite

Name: Flexicalymene (Flexycalymene) retrorsa

Trilobites, Order Phacopida, Suborder Calymenina, Family: Calymenidae

Geologic Time: Ordovician

Size: 36 mm

Fossil Site: Arnheim formation, Highland County, Ohio

A large and pristine example of a common trilobite from the Ordovician of Ohio, Flexicalymene retrorsa, a Calymenid trilobite (Order Phacopida; Family: Calymenidae) coming from the Ordovician Richmond Formation strata of Mount Orab, Ohio. Studies have shown that trilobites such as these can be transported over considerable distances by slow moving water currents.

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