Megistaspis is a genus of trilobites in the order Asaphida and family Asaphidae. They lived in the Ordovician period (478-449 million years ago), from the Upper Tremadocian age until the Lower Llanvim age. These arthropods were a low-level epifauna, fast-moving and detritivore. Distribution Ordovician of Australia, China, Colombia (Serranía de la Macarena, Meta), the Czech Republic, Iran, Norway, United States (Nevada); Arenig of Argentina, Bolivia, China, France, Norway, Sweden, United States (Montana); Dawan of China; Arenigian of Argentina. Gallery References External links Sepkoski, Jack Sepkoski's Online Genus Database – Trilobita Asaphidae Asaphida genera Ordovician trilobites of Africa Fezouata Formation fossils Ordovician trilobites of Asia Ordovician trilobites of Europe Ordovician trilobites of North America Ordovician United States Ordovician trilobites of South America Ordovician Argentina Ordovician Bolivia Ordovician Colombia Cambrian first appearances Silurian extinctions Tremadocian Fossil taxa described in 1956