Polyptychites
| Polyptychites Temporal range: Early Cretaceous (Valanginian) | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Polyptychitidae |
| Genus: | †Polyptychites Pavlov, 1892 |
Polyptichites is the perisphictoidean ammonite genus from the Lower Cretaceous of Russia. The shell is subinvolute and coarsely ribbed; ribs bifurcate or trifurcate mid or low on the flanks and cross over the rounded venter. The umbilicus is relatively small and deep. Outer whorls partially envelop the previous leaving a fairly deeply impressed dorsum.
References
[edit]- Polyptichites, jsdammonites.fr
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