Rostroconchia - Ribeirioida - Ribeiriidae

Synonym: Opikella Runnegar and Pojeta, Jr. 1974 [replaced name]

Full reference: J. Pojeta and B. Runnegar. 1976. The paleontology of rostroconch mollusks and the early history of the phylum Mollusca. United States Geological Survey Professional Paper 968:1-88

Parent taxon: Ribeiriidae according to J. Pojeta and B. Runnegar 1976

Sister taxa: Apoptopegma, Cymatopegma, Pinnocaris, Ptychopegma, Ribeiria, Ribeirina, Wanwania

Subtaxa: Oepikila cambrica

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Type: Opikella cambrica

Ecology: stationary semi-infaunal suspension feeder