|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Purpurinidae
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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.
|A. V. Guzhov 2004||Shell medium-sized, conical or turriculate, rarely, barrel-shaped, with thick walls and straight generating line. Whorls nongradate, flattened. Suture ranging from deep and angular to very shallow. Usually, whorls with few folds, aligned in regular rows, so that shell is pentahedral pyramid shaped. Rarely, whorls ornamented by coarse ribs. Spinelike tubercles formed at intersections of folds and ribs. Last whorl unknown. Shell base high, widely conical, convex. Aperture circular. Two or, rarely, one columellar fold runs inside whorls. Single internal fold present in middle of outer lip. Type species only has paired callosities on columellar side of aperture.|