Tergomya - Cyrtonellida

Synonym: Isospiridae Wängberg-Eriksson 1964

Full reference: J. B. Knight and E. L. Yochelson. 1958. A reconsideration of the Monoplacophora and the primitive Gastropoda. Proceedings of the Malacological Society of London 33(1):37-48

Parent taxon: Cyrtonellacea according to G.P. Wahlman 1992

Sister taxa: Cyclocyrtonellidae, Multifariidae

Subtaxa: Cyrtonella, Isospira

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Ecology: slow-moving low-level epifaunal grazer