Ordovician |
The Ordovician Period With the dawn of the Ordovician Period new families of trilobites appeared. They continued to remain stable through the Lower and Middle Ordovician, with a steady decline during the Upper Ordovician |
Paraszechuanella szechuanensis Age: L. Ordovician Location: China |
Placoparia borni Location: Spain |
Prionocheilus mendax Location: Portugal |
Salterocoryphe salteri Location: Portugal |
Colpocoryphe roualti Location: Spain |
Asaphus raniceps Age: M. Ordovician Location: Russia |
Asaphus kowalewski Age: M. Ordovician Location: Russia |
Calyptaulax callicephalus Formation: Verulam Age: M. Ordovician Location: Ontario |
Flexicalymene meeki Formation: Waynesville Age: U. Ordovician Location: Ohio |
Flexicalymene senaria Formation: Verulam Age: M. Ordovician Location: Canada |
Diacalymene ouzregui Age: L. Ordovician Location: Morocco |
Selenopeltis bucchii Age: U. Ordovician Location: Morocco |
Illaenus sarsi Age: M. Ordovician Location: Sweden |
Homotelus bromidensis Formation: Bromide Age: M. Ordovician Location: Oklahoma |
Ogygiocarella debuchii Age: M. Ordovician Location: Wales |
Pseudogygites latimarginatus Formation: L. Whitby Age: M/U Ordovician Location: Canada |
Isotelus maximus Formation: Arnheim Age: U. Ordovician Location: Ohio |
Isotelus maximus Formation: Arnheim Age: U. Ordovician Location: Ohio |
Pliomera fischeri Age: M. Ordovician Location: Russia |
Ampyxina bellatula Formation: Maquoketa Age: U. Ordovician Location: Missouri |
Ordovician Trilobites 490-443 MYA |
Ordovician |
