|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Cyrtoneritimorpha - Orthonychiidae
It was reranked as Capulus (Orthonychia) by Whidborne (1896); it was reranked as Platyceras (Orthonychia) by Knight et al. (1960).
It was assigned to Capulus by Whidborne (1896); to Platyceras by Knight et al. (1960); to Archaeogastropoda by Sepkoski (2002); and to Orthonychiidae by Bandel and Frýda (1999) and Bouchet et al. (2005).
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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.