Trilobita - Phacopida - Calymenidae
Parent taxon: Calymenidae according to A. W. Owen and D. L. Bruton 1980
See also Siveter 1977
Sister taxa: Calymenesum, Calymeninae, Flexicalymeninae, Gravicalymene, Linguocalymene, Liocalymene, Neseuretus, Nipponocalymene, Onnicalymene, Papillicalymene, Platycalymene, Pradoella, Protocalymene, Reacalymene, Reedocalymene, Reedocalymeninae, Salterocoryphe, Spathacalymene, Tapinocalymene
Subtaxa: Prionocheilus Xuanenia
Ecology: nektobenthic carnivore
Distribution:
• Ordovician of Algeria (1 collection), Belgium (1), Canada (1: Quebec), China (4), the Czech Republic (12), France (7), Latvia (2), Morocco (4), Norway (18), Portugal (5), the Russian Federation (3), Spain (17), Sweden (14), the United Kingdom (6)
• Llandeilo of China (3)
• Arenig of France (1), Morocco (2), Spain (1)
Total: 102 collections including 108 occurrences