Tergomya - Cyrtonellida - Cyrtolitidae
Parent taxon: Cyrtolites according to T.A. Conrad 1838
Sister taxa: Cyrtolites (Cyrtonella), Cyrtolites budleighensis, Cyrtolites claysferryensis, Cyrtolites craigensis, Cyrtolites dilatus, Cyrtolites disjunctus, Cyrtolites grandis, Cyrtolites hornyi, Cyrtolites inornatum, Cyrtolites inprobus, Cyrtolites insculptus, Cyrtolites nodosus, Cyrtolites occultus, Cyrtolites ornatus, Cyrtolites retrorsus, Cyrtolites rugosus, Cyrtolites seminulum, Cyrtolites sinuatus, Cyrtolites sinuosus, Cyrtolites thraivensis, Cyrtolites trentonensis, Cyrtolites tuboides, Cyrtolites undulatus
Subtaxa: Cyrtolites (Cyrtolites) minor
Ecology: slow-moving low-level epifaunal grazer
Distribution: found only at Clitambonites Beds, near Cannon Falls (Ordovician of Minnesota)