Acastidae
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Acastidae is a family of trilobites in the order Phacopida, suborder Phacopina, superfamily Acastoidea, containing the following genera:
| Acastava Acaste Acastella Acastellina Acastocephala Acastoides Acastopyge Armorigreenops Asteropyge Baniaspis Bellacartwrightia Bradocryphaeus Braunops Breizhops Centauropyge Chimaerastella Coltraneia Comura Cryphina Delocare Deloops Destombesina Dunopyge | Echinopyge Erbenochile Ewacaste Feruminops Gourdonia Greenops Gudralisium Hallandclarkeops Harringtonacaste Heliopyge Hexacosta Hollardops Kayserops Kennacryphaeus Kloucekia Llandovacaste Metacanthina Mimocryphaeus Minicryphaeus Morocconites Mrakibina Neocalmonia Neometacanthus | Paracryphaeus Pelitlina Phacopidina Philonyx Pilletina Protacanthina Pseudocryphaeus Psychopyge Quadratispina Quadrops Radiopyge Rheicops Rhenops Saharops Sanidopyge Scotiella Sokhretia Stummiana Talus Tolkienia Treveropyge Turcopyge Walliserops |