|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Architectibranchia - Cylindrobullinidae
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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.
|J. Gründel and A. Nützel 2012||The shell is cylindrical and has a high last whorl and a low spire. The shell has a subsutural ramp. The transition from the ramp to the outer whorl face is rounded or sharply angular. The flanks are straight to slightly convex. There is no bordering spiral furrow. The shell is smooth. The growth lines are weakly prosocyrt between the abaxial edge of the ramp and the centre of the base. The aperture is very high and narrow with straight outer lip in its adapical portion. Its anterior part is broader and rounded. The columellar inner lip is broadened and bent backward (it covers the central part of the base) and bears one or two folds. The protoconch is unknown.|