Cheiruridae

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Cheiruridae Fossil range: Ordovician to Devonian
Conservation status
Extinct (fossil)
Scientific classification
Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Phacopida Family: Cheiruridae
Genus
Cheirurus (type genus) Deiphon Crotalocephalus Ceraurus (others)

The family Cheiruridae ("Hand-Tails") was a family of phacopid trilobites of the suborder Cheirurina. Its members, as with other members of the suborder, had distinctive pygidia modified into finger-like spines.

They first appeared during the Ordovician, and died out at the Devonian/Carboniferous extinction event.