Asaphidae is a family of Asaphida . Although the first genera originate in Upper Cambrian marine strata, the family becomes the most widely distributed and most species-rich trilobite family during the Ordovician. 754 species assigned to 146 genera are included in Asaphidae.
Distribution
Most Asaphinae are characteristic of
Baltica. Isotelinae genera are concentrated in
Laurentia. The genera of Nobiliasaphinae are distributed in tropical
Gondwana and South China. The genera of Ogygiocaridinae occur in
Avalonia, Gondwana and Baltica. Asaphidae asaphids were already fairly common during the Upper-Cambrian, when 14 genera are known from Australia, North- and South-China. The last members of the family died-out at the end of the Ordovician.
Assigned genera
Asaphidae contains the following genera:
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