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Extinct family of sharks From Wikipedia, the free encyclopedia
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 ![]() | |
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 | |
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]