Fayolia
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| Fayolia Temporal range:
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|---|---|
| Scientific classification Edit this classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | †Xenacanthiformes |
| Family: | †Xenacanthidae |
| Genus: | †Fayolia Renault & Zeiller, 1884 |
| Type species | |
| †Fayolia dentata Renault & Zeiller, 1884
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| Species[1] | |
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Fayolia is a genus of fossil egg capsule, widely thought to have been produced by xenacanths.[2] The egg is elongate and tapers towards both ends, and surrounded by helically twisted collarettes, with one end (the beak) having a tendril.[3]
It is predominantly known from freshwater deposits with 16 species spanning a stratigraphic range from the Late Devonian to the Middle Triassic.[3] A new species, Fayolia sharovi, was described in 2011 from lacustrine deposits of the Middle Triassic Madygen Formation in Kyrgyzstan, Central Asia.[4]
References
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Further reading
[edit | edit source]- J. Fischer and I. Kogan. 2008. Elasmobranch egg capsules Palaeoxyris, Fayolia and Vetacapsula as subject of palaeontological research – an annotated bibliography. Freiberger Forschungshefte C528:75-91
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