Phylloceratina
In today's world, Phylloceratina has become a topic of great relevance and interest to a wide audience. Since its appearance, Phylloceratina has generated debate and controversy, giving rise to a variety of opinions and approaches that reflect the diversity of perspectives on this topic. As Phylloceratina continues to capture society's attention, it is important to closely examine its implications, consequences, and potential solutions. In this article, we will exhaustively explore all aspects related to Phylloceratina, providing the reader with a complete and updated vision of this topic that is so relevant today.
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| Phylloceratina Temporal range:
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| Fossil shells of Phylloceras serum from Southern Alps, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Suborder: | †Phylloceratina |
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The Phylloceratina comprise a suborder of ammonoid cephalopods, belonging to the Ammonitida, whose range extends from the Lower Triassic to the Upper Cretaceous. Shells of the Phylloceratina are generally smooth with small to large umbilici and complex sutures with leaf-like phylloid saddle endings and lobes with thorn-like projections.
Phylogeny
The Phylloceratina are most likely derived from the Ceratitid Deineroceratidae, which is thought to have given rise early in the Triassic to the Ussuritidae. The Ussuritidae is the ancestral family of the Phylloceratina. The Ussuritidae extend through the Upper Triassic but not into the Jurassic, and gave rise to the Upper Triassic Discophyllitidae. The Discophyllitidae is the probable source for the L Jurassic - U Cretaceous Phylloceratidae and possibly for the L Jurassic Juraphyllitidae.
The Phylloceratina gave rise early in the Jurassic through the Phylloceratidae to the Lytoceratina, which in turn gave rise to most of the Ammonitina The Phylloceratidae also gave rise to the Psiloceratoidea at the beginning of the Jurassic and to the Desmoceratoidea in the Early Cretaceous, both of which are considered Ammonitina. The Ancyloceratina is a collection of highly evolved Lytoceratina.
References
- ^ Treatise on Invertebrate Paleontology Part L Mollusca 4, Ammonoidea, 1957
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