|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Murchisoniina - Eotomariidae
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.
|L.E. Popov et al. 2007||A species of Ptychonema with four whorls that differs from other species of the genus by having a strongly rounded, parabolic whorl profile. It shares a small size and deep sinus placed mostly above the periphery with P. marocanum Horný, 1997, but differs from other species of the genus in this respect. It differs from P. marocanum in having more strongly curved growth lines on the upper whorl surface, and by having a less inclined and thicker inner lip. The nature of the inner lip also differ from that of the other species of the genus.|