| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Praehyalocylis
Taxonomy
Praehyalocylis is a genus. It is not extant.
It was assigned to Cavoliniidae by Squires (1989); and to Thecosomata by Sepkoski (2002).
It was assigned to Cavoliniidae by Squires (1989); and to Thecosomata by Sepkoski (2002).
Species
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| 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. |