Rhynchonellata - Orthida - Productorthidae
Parent taxon: Orthoidea according to M. Liljeroth et al. 2017
See also Benedetto 2003 and Williams et al. 2000
Sister taxa: Anomalorthidae, Archaeorthidae, Bajanorthis, Bohemiellidae, Cathaysiorthidae, Glyptorthidae, Hesperonomiidae, Hesperorthidae, Lycophoriidae, Malinella, Nugnecella, Orthidae, Orthidiellidae, Ottadalenites, Plaesiomyidae, Poramborthidae, Skenidioidae, Tarfayidae, Turarella, Whittardiidae, Zhejiangorthis, Dinorthidae, Dolerorthidae
Subtaxa: Glossorthinae Productorthinae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Ordovician of Argentina (2 collections), Belarus (2), Belgium (5), Canada (3: Newfoundland), China (27), Estonia (132), France (6), Haiti (2), Iran (1), Ireland (9), Latvia (14), Lithuania (30), Myanmar (4), Norway (24), Portugal (2), the Russian Federation (111), Spain (3), Sweden (10), the United Kingdom (36), United States (2: Maine, Virginia)
• Llandeilo of China (1)
• Whiterockian of United States (1: California)
• Arenig of Canada (1: New Brunswick), Sweden (1), the United Kingdom (1)
• Klabava of the Czech Republic (2)
• Arenigian of Argentina (6), the Russian Federation (1), United States (1: Maine)
Total: 440 collections including 486 occurrences