|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Gastropoda - Sorbeoconcha - Planaxidae
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.
|C. L. Garvie 1996||Shell medium in size, of two and a half whorls with very deeply impressed sutures, the last whorl comprising almost the entire shell. The first one and a half whorls are similar to an Adeorbis, with a globose protoconch that develops stronger spiral sculp' turc on the last whorl. The last whorl making up the adult shell expands very rapidly, opening out trumpet-like, the aperture in a plane parallel to the axis. The outer lip is simple, the columella thin, vertical and defining one edge of a deep but narrow umbilicus. The ornament consists of narrow spiral ribs, 22 on the last whorl, 12 on the preceding. (Free translation of Oppenheim, 1896, pp. 165-166)|