Full reference: T. Kobayashi. 1933. Faunal study of the Wanwanian (basal Ordovician) series with special notes on the Ribeiridae and the Ellesmereoceroids. Journal of the Faculty of Science Imperial University of Tokyo Section II Geology, Mineralogy, Geography, Seismology 3(7):249-328
Parent taxon: Ribeirioida according to P. J. Wagner 2023
Sister taxa: Ribeirioidea, Technophoridae
Subtaxa: Ischyriniidae
Ecology: stationary semi-infaunal suspension feeder
Distribution:
• Dobrotivian of Spain (1 collection)
• Arenig of Argentina (2)
• Ordovician of Argentina (1), Australia (11), Canada (5: Quebec), France (2), Germany (1), the Netherlands (1), Norway (1), Portugal (1), the Russian Federation (4), South Korea (1), Spain (4), United States (2: New York)
• Cambrian of Australia (4), Canada (1: Nova Scotia), United States (2: New York)
Total: 44 collections including 47 occurrences