Article · Wikipedia archive · Last revised Jul 8, 2026

Fayolia

Fayolia is a genus of fossil egg capsule, widely thought to have been produced by xenacanths. The egg is elongate and tapers towards both ends, and surrounded by helically twisted collarettes, with one end having a tendril.

Last revised
Jul 8, 2026
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≈ 1 min
Length
260 w
Citations
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Fayolia
Temporal range:
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
Species1
  • †Fayolia dentata Renault & Zeiller, 1884
  • †Fayolia sharovi Fischer et al., 2011
  • †Fayolia sterzeliana Weiss, 1887

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

References

  1. "PBDB Taxon".
  2. Jörg W. Schneider; Wolfgang Reichel (1989). "Chondrichthyer-Eikapseln aus dem Rotliegenden (Unterperm) Mitteleuropas — Schlußfolgerungen zur Paläobiologie paläozoischer Süsswasserhaie". Freiberger Forschungshefte. C 436: 58–69.
  3. 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.
  4. 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

Further reading

  • 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