Alternative spelling: Cyrtonellacea
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: Cyrtonellida according to P. J. Wagner 2023
See also Knight and Yochelson 1958, Knight and Yochelson 1960 and Wahlman 1992
Sister taxa: Aremellia, Carcassonnellidae, Cyrtolitidae, Hamusella, Pollicinidae, Tetamocornu, Yangtzeconus
Subtaxa: Cyclocyrtonellidae Cyrtonellidae Multifariidae
Ecology: slow-moving low-level epifaunal grazer
Distribution:
• Devonian of United States (9: New York collections)
• Silurian of the Czech Republic (1)
• Ordovician of Estonia (2), Sweden (1), the United Kingdom (1), United States (2: Tennessee, Virginia)
Total: 16 collections each including a single occurrence