|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.
|W. F. Ponder 1984||Shell: of medium size, rather thin, elongate-conic, non-umbilicate, with close, low spiral cords. Whole surface very minutely pitted. Aperture with distinct anterior and posterior angulations, weakly channelled at angles; simple perisome and strong varix on orthocline outer lip. Occasional varices formed, particularly on body whorl (Fig. 66). Protoconch dome shaped, with about 3 convex whorls; smooth.|