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]
| Fayolia Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | †Xenacanthida |
| Family: | †Xenacanthidae |
| Genus: | †Fayolia Renault & Zeiller, 1884 |
| Type species | |
| †Fayolia dentata Renault & Zeiller, 1884
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| Species[1] | |
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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
edit- ^ "PBDB Taxon".
- ^ Jörg W. Schneider; Wolfgang Reichel (1989). "Chondrichthyer-Eikapseln aus dem Rotliegenden (Unterperm) Mitteleuropas — Schlußfolgerungen zur Paläobiologie paläozoischer Süsswasserhaie". Freiberger Forschungshefte. C 436: 58–69.
- ^ a b Fischer, Jan; Licht, Martin; Kriwet, Jürgen; Schneider, Jörg W.; Buchwitz, Michael; Bartsch, Peter (3 April 2014). "Egg capsule morphology provides new information about the interrelationships of chondrichthyan fishes". Journal of Systematic Palaeontology. 12 (3): 389–399. Bibcode:2014JSPal..12..389F. doi:10.1080/14772019.2012.762061. ISSN 1477-2019.
- ^ Jan Fischer; Sebastian Voigt; Jörg W. Schneider; Michael Buchwitz; Silke Voigt (2011). "A selachian freshwater fauna from the Triassic of Kyrgyzstan and its implication for Mesozoic shark nurseries". Journal of Vertebrate Paleontology. 31 (5): 937–953. Bibcode:2011JVPal..31..937F. doi:10.1080/02724634.2011.601729. S2CID 85753690.
Further reading
edit- 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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