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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Ataphridae
Diagnosis. Shell low-spired, lens-shaped, with two spiral edges or keels; base moderately to weakly convex; umbilicus surmounted by radial folds; apertural edge broadened triangularly on the transition from the columella to the base.
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.