* Subclass Librostoma contains Proetida, Harpetida, Ptychopariida, Asaphida
Asaphida Trilobite Fossil Examples:
Orygmaspis contracta
Megistaspis triangularis
Declivolithus cf. alfredi
Dactylocephalus sp
Family Andrarinidae
Genera: Andrarina - Groenwallia - Groenwallina (3 genera)
Family Anomocarellidae
Family Anomocaridae
Family Aphelaspididae
Family Parabolinoididae
Family Pterocephalidae
Family Asaphidae
Family Ceratopygidae
Family Cyclopygidae
Family Nileidae
Family Taihungshaniidae
Family Dikelocephalidae
Family Eurekiidae
Family Ptychaspididae
Family Saukiidae
Asaphida Superfamily Remopleuridioidea
Family Auritamiidae
Family Bohemillidae
Family Hungaiidae
Family Idahoiidae
Family Remopleurididae
Asaphida Superfamily Trinucleioidea
Family Alsataspididae
Family Dionididae
Family Lisaniidae
Family Raphiophoridae
Family Trinucleidae
Trilobites Home Trilobites Site Map Trilobite Systematics Agnostida Redlichiida Corynexochida Phacopida Lichida Odontopleurida Proetida Harpetida Ptychopariida Asaphida Nectaspida