Alternative combination: Opikella cambrica
Full reference: B. Runnegar and J. Pojeta, Jr. 1974. Molluscan phylogeny: the paleontological viewpoint. Science 186(4161):311-317
Sister taxa: none
Type specimen: Its type locality is Locality 85. Low strike rises of limestone in low soil plains, on road from 20-Mile Bore to Glenormiston, 9.5 kilometers NNE of 20-Mile Bore, which is in an Idamean marine limestone in the Georgina Formation of Australia.
Ecology: stationary semi-infaunal suspension feeder