|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Tergomya - Cyrtonellida - Cyrtolitidae
It was reranked as Cyrtonella by Knight and Yochelson (1960), Starobogatov (1970), Runnegar and Jell (1976), Sepkoski (2002) and Wagner (2017).
It was assigned to Cyrtolites by Hall (1879); to Cyrtolitidae by Runnegar and Jell (1976); to Cyrtonellida by Sepkoski (2002); and to Cyrtonellidae by Knight and Yochelson (1960), Starobogatov (1970) and Wagner (2017).
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