Tergomya - Cyrtonellida - Cyrtolitidae

Alternative spelling: Cyrtolites (Paracyrtolites)

Full reference: G.P. Wahlman. 1992. Middle and Upper Ordovician symmetrical univalved molluscs (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. United States Geological Survey Professional Paper 1066(O):1-123

Parent taxon: Cyrtolitidae according to P. J. Wagner 2011

Sister taxa: Carcassonnellinae, Cyclocyrtonella, Cyrtodiscus, Cyrtolites, Cyrtonellopsis, Kolihadiscus, Neocyrtolites, Quasisinuites, Sinuella, Sinuitopsina, Sinuitopsis, Telamocornu, Yochelsonellis

Subtaxa: Paracyrtolites carinatus, Paracyrtolites parvus, Paracyrtolites subplanus

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Ecology: slow-moving low-level epifaunal grazer