Calymenina is a suborder of the trilobite order

Phacopida Phacopida ("lens-face") is an order of trilobites that lived from the Late Cambrian to the Late Devonian. It is made up of a morphologically diverse assemblage of taxa in three related suborders. Characteristics Phacopida had 8 to 19 thoraci ...

References

Phacopida Prehistoric animal suborders Arthropod suborders Devonian trilobites Trilobites of Australia {{Phacopida-stub