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Ptychonema agyris
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
| Year | Name and author |
|---|---|
| 2007 | Ptychonema agyris Popov et al. pp. 34-45 figs. 5-7 |
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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.
†Ptychonema agyris Popov et al. 2007
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| 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. |