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Ptychonema agyris

Gastropoda - Murchisoniina - Eotomariidae

Taxonomy
Ptychonema agyris was named by Popov et al. (2007) [Ebbestad in]. Its type specimen is NMW98.66G.946, a shell, and it is not a trace fossil. Its type locality is Locality 510, Kyrgyz Range, North Tien Shan, which is in a Longvillian/Onnian carbonate siltstone/limestone in the Almaly Formation of Kyrgyzstan.

Synonymy list
YearName and author
2007Ptychonema agyris Popov et al. pp. 34-45 figs. 5-7

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
classGastropodaCuvier 1797
RankNameAuthor
subclassOrthogastropoda
orderMurchisoniina
superfamilyEotomarioidea
familyEotomariidaeWenz 1938
subfamilyEotomariinae
genusPtychonema
speciesagyris

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.

Diagnosis
ReferenceDiagnosis
L.E. Popov et al. 2007A 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 HornĂ½, 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.