|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Tergomya - Cyrtonellida - Cyrtolitidae
It was reranked as Bellerophon (Sinuitopsis) by Troedsson (1919); it was reranked as Sinuites (Sinuitopsis) by Knight et al. (1960).
It was assigned to Bellerophon by Troedsson (1919); to Sinuites by Knight et al. (1960); to Bucanellidae by Starobogatov (1970); to Cyrtolitidae by Horný (1986); and to Cyrtonellida by Sepkoski (2002).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.