Cheiruridae
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| Cheiruridae Fossil range: Ordovician to Devonian |
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Fossil
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Cheirurus (type genus) |
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 near the very beginning of the Ordovician, and died out at the Devonian/Carboniferous extinction event with all other phacopids.
