Artiopoda - Phacopida - Acastidae
Parent taxon: Acastidae according to M. D. G. Carvalho and J. Moody 2000
Sister taxa: Acastava, Acastavinae, Acaste, Acastella, Acastellina, Acastoides, Acastopyge, Armorigreenops, Baniaspis, Bellacartwrightia, Braunops, Breizhops, Centauropyge, Chimaerastella, Coltraneia, Cryphina, Delocare, Deloops, Echinopyge, Feruminops, Gourdonia, Greenops, Gudralisium, Hallandclarkeops, Harringtonacaste, Hexacosta, Hollardops, Kayserops, Kennacryphaeus, Kloucekia, Llandovacaste, Mimocryphaeus, Morocconites, Neocalmonia, Paracryphaeus, Pelitlina, Phacopidina, Pilletina, Protacanthina, Pseudocryphaeus, Psychopyge, Rheicops, Sanidopyge, Scotiella, Sokhretia, Stummiana, Tolkienia, Treveropyge, Turcopyge, Walliserops
Subtaxa: Alcaldops Asteropyge Bradocryphaeus Destombesina Dunopyge Gandlops Ganetops Heliopyge Jaylopygiella Metacanthina Minicryphaeus Morzadecops Pennarbedops Platykardiapyge Quadratispina Radiopyge Rhenops
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Givetian of Iran (1 collection), Venezuela (2)
• Devonian of Afghanistan (5), Algeria (1), Belgium (12), Czechia (1), France (21), Germany (12), Iran (2), Libya (1), Luxembourg (1), Mauritania (1), Morocco (25), Poland (2), Spain (23), Türkiye (1), Ukraine (1), the United Kingdom (1)
Total: 113 collections including 146 occurrences