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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Rissoidae
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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.
|W. F. Ponder 1984||Shell: as for genus but axial sculpture always strong, spiral sculpture weak or absent except for a few spiral cords on periphery and upper base in some species. Lower base with a strong spiral fold (Figs 53A; 134A, E, F). Protoconch as for Rissoina s.s. (Fig. 134C).|