Rostroconchia - Ribeirioida

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 1997

Sister taxa: Ischyrinioidea, Pseudoeuchasma, Technophoridae

Subtaxa: Ribeiriidae

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Ecology: stationary semi-infaunal suspension feeder