†family Pharostomatidae Hupé 1953 (trilobite)
Trilobita - Phacopida - Pharostomatidae
Parent taxon: Calymenina according to J. M. Adrain 2011
See also Jell and Adrain 2002
Sister taxa: Bathycheilidae, Bavarillidae, Calymenidae, Homalonotidae
Subtaxa: Altiplanelaspis Paivinia Pharostomina Ptychometopus Thulincola
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Arenig of France (1 collection)
• Ordovician of Argentina (1), France (1), the Russian Federation (1), the United Kingdom (4)
• Tremadoc of Argentina (5), Bolivia (3), the Czech Republic (2), Mexico (2), Morocco (1), Spain (2)
• Cressagian of the United Kingdom (1)
Total: 24 collections including 26 occurrences