Fayolia

Fayolia; Temporal range: Late Devonian–Middle Triassic PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Xenacanthida
Genus:	†Fayolia; Renault & Zeiller, 1884
Binomial name
	†Fayolia dentata; Renault & Zeiller, 1884
Other species
	†F. sterzeliana Weiss, 1887; †F. sharovi Fischer et al., 2011;
Synonyms
	Fayolia sterzeli;

Fayolia is a genus of fossil egg capsule, widely thought to have been produced by xenacanths.^[1] The egg is elongate and tapers towards both ends, and surrounded by helically twisted collarettes, with one end (the beak) having a tendril.^[2]

It is predominantly known from freshwater deposits with 16 species spanning a stratigraphic range from the Late Devonian to the Middle Triassic.^[2] A new species, Fayolia sharovi, was described in 2011 from lacustrine deposits of the Middle Triassic Madygen Formation in Kyrgyzstan, Central Asia.^[3]

References[edit]

^ 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 (2014-04-03). "Egg capsule morphology provides new information about the interrelationships of chondrichthyan fishes". Journal of Systematic Palaeontology. 12 (3): 389–399. 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. doi:10.1080/02724634.2011.601729. S2CID 85753690.

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[1] Jörg W. Schneider; Wolfgang Reichel (1989). "Chondrichthyer-Eikapseln aus dem Rotliegenden (Unterperm) Mitteleuropas — Schlußfolgerungen zur Paläobiologie paläozoischer Süsswasserhaie". Freiberger Forschungshefte. C 436: 58–69.

[:0-2] Fischer, Jan; Licht, Martin; Kriwet, Jürgen; Schneider, Jörg W.; Buchwitz, Michael; Bartsch, Peter (2014-04-03). "Egg capsule morphology provides new information about the interrelationships of chondrichthyan fishes". Journal of Systematic Palaeontology. 12 (3): 389–399. doi:10.1080/14772019.2012.762061. ISSN 1477-2019.

[3] 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. doi:10.1080/02724634.2011.601729. S2CID 85753690.

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