|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Thecosomata - Cavoliniidae
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.
|R. L. Squires 1989||Shell large, conical, straight-sided with prominent transverse annulations; apical area very narrow and very elongate, separated from rest of shell by a narrow neck.|