Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Parent taxon: Rhynchotrematidae according to A. Williams et al. 2002
See also Amsden 1983
Sister taxa: Rhynchotrematinae, Stegerhynchella
Subtaxa: Hypsiptycha Lepidocyclus Rhytidorhachis
Type: Lepidocyclus
Ecology: stationary epifaunal suspension feeder
Distribution:
• Oligocene of Italy (2 collections)
• Silurian of Canada (7: Nunavut, Ontario), the Czech Republic (1), United States (1: Indiana)
• Ordovician to Silurian of United States (2: California)
• Ordovician of Australia (3), Canada (50: British Columbia, Manitoba, Northwest Territories, Nunavut, Quebec), China (1), the United Kingdom (4), United States (86: California, Colorado, Georgia, Illinois, Illinois, Iowa, Indiana, Iowa, Minnesota, Missouri, Nevada, New Mexico, Ohio, Oklahoma, Tennessee, Texas, Wisconsin, Wyoming)
Total: 157 collections including 181 occurrences