Rhynchonellata - Orthida - Hesperonomiidae
Parent taxon: Orthoidea according to J. Hansen and L. E. Holmer 2011
See also Benedetto 2003 and Williams et al. 2000
Sister taxa: Anomalorthidae, Archaeorthidae, Bajanorthis, Bohemiellidae, Cathaysiorthidae, Glyptorthidae, Hesperorthidae, Lycophoriidae, Malinella, Nugnecella, Orthidae, Orthidiellidae, Ottadalenites, Plaesiomyidae, Poramborthidae, Productorthidae, Skenidioidae, Tarfayidae, Turarella, Whittardiidae, Zhejiangorthis, Dolerorthidae, Dinorthidae
Subtaxa: Hesperonomia Hesperonomiella Mollesella Monorthis Murjukiana Protohesperonomia Treioria Zhanorthis
Ecology: stationary epifaunal suspension feeder
Distribution:
• Whiterockian of United States (3: Utah collections)
• Fennian of France (1)
• Volkhov of Argentina (1)
• Arenig of Argentina (8), China (7), France (1), the United Kingdom (3)
• Dawan of China (1)
• Arenigian of Argentina (9), United States (3: Nevada, Utah)
• Ordovician of Argentina (1), Canada (2: Alberta, British Columbia), Iran (2), Ireland (1), Kazakhstan (2), Norway (1), Spain (1), the United Kingdom (4), United States (52: California, Idaho, Nevada, Tennessee, Texas, Utah)
• Canadian of Canada (5: Northwest Territories, Québec)
• Tremadoc of China (2)
• Ibexian of United States (1: Nevada)
Total: 111 collections including 129 occurrences