|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Heterostropha - Cylindrobullinidae
Diagnosis. Shell broadly oval with acute spire; last whorl evenly convex; subsutural ramp with spiral rib, ramp demarcated from whorl face by deep broad spiral furrow; whorls and base covered with 1522 spiral furrows; columellar and parietal lip are at a low angle to each other (not continuously arched).
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.