일반명:삼엽충(Trilobitr)
학명: Flexicalymene meeki
크기: (가로+세로+두께) (25mm+24mm+13mm)
시대: 오로도비스기(ordovician)
지층: Richmond formation
원산지: Arnheim member mt.orab ohio USA

Flexicalymene is a genus of trilobites of the order Phacopida, suborder Calymenina. They are found abundantly in North America. Flexicalymene can be mistaken for Calymene, Gravicalymene, Diacalymene and a few other Calymenina genera. They are used as an index fossil in the Ordovician. Ohio is particularly known for being rich with Flexicalymene fossils. Species include:

• Flexicalymene meeki, Ohio, Kentucky and Indiana.
• Flexicalymene retrorsa, Ohio, Kentucky and Indiana.
• Flexicalymene granulosa, Ohio, Kentucky and Quebec.
• Flexicalymene senaria, Quebec.
• Flexicalymene croneisi, Ontario.