Artiopoda - 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 Prionocheilus Ptychometopus Thulincola
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Dobrotivian of Czechia (1 collection), France (2), Morocco (1), Portugal (3), Spain (10)
• Letna of Czechia (2)
• Billingen of the Russian Federation (1)
• Arenig of France (1), Morocco (2), Spain (1)
• Ordovician of Algeria (1), Argentina (6), Belgium (1), Bolivia (3), Canada (1: Quebec), China (3), Czechia (16), France (6), Ireland (3), Latvia (2), Mexico (2), Morocco (4), Norway (18), Portugal (3), the Russian Federation (3), Spain (10), Sweden (15), the United Kingdom (20)
Total: 141 collections including 150 occurrences