|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Rissoidae
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.
|K. E. H. Palmer 1947||Small, elevated ; nucleus smooth, .composed of about two whorls ; smooth base ; surface with strong longitudinal ribs which are strongly curved, forming a deep sinus at the posterior area of the aperture and producing a twisted flaring anterior margin to the aperture.|