|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Ranellidae
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. G. Beu 1988||Shell small for the subfamily (about 40-60 mm high), with small protoconch similar to that of modern A rgobuccinum species. Varices aligned, or nearly so, down initial 3-4 teleoconch whorls, becoming separated by 5· -10· on later whorls of some species, bearing 3 moderately to very prominent, rounded nodules· where crossed by the major spiral cords. Intervariceal sculpture of 3 or 4 rows of small to large, rounded nodules on the major spiral cords, and of interstitial spiral threads. Aperture similar to that of Ranella, but with outer lip interior gently rounded and weakly sculptured or with low nodules along inner edge, lacking the prominent angulation of Ranella species ; a row of small nodules on base of columella ; parietal tubercle constricts a shallow posterior sinus; anterior canal rather short, moderately narrow, straight or weakly deflected dorsally and to the left.|