Cyrtospirifer

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Cyrtospirifer
Temporal range: Upper Givetian - Lower Famennian
Cyrtospirifer verneuili duo.jpg
Cyrtospirifer verneuili from Namur (Belgium), Upper Devonian
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Spiriferida
Family: Cyrtospiriferidae
Genus: Cyrtospirifer
Nalivkin, 1924
Species
  • C. verneuili (Murchison), 1840 (type) = Spirifer verneuili, S. lonsdalii
  • C. ainosawensisTazawa, Inose & Kaneko, 2017
  • C. aouinetensisGourvennec, 2019 [1]
  • C. archiaci(Murchison, 1840)
  • C. chemungensis(Conrad, 1842) = Delthyris chemungensis, C. altiplicus
  • C. choanjiensisTazawa, 2017
  • C. conoideus(Roemer, 1843)
  • C. disjunctus(Sowerby,1840)
  • C. inermis(Hall, 1843) = Delthyris inermis
  • C. hornellensisGreiner, 1957
  • C. kharaulakhensisFredericks, 1919
  • C. loonesiBrice, 2002
  • C. mylaensisSokiran, 2006
  • C. placitusStainbrook, 1945
  • C. preshoensisGreiner, 1957
  • C. robardetiGourvennec, 2019 [1]
  • C. rudkinensisSokiran, 2006
  • C. schelonicusNalivkin, 1941
  • C. syringothyriformis(Paeckelmann, 1942)
  • C. tenticulum(Verneuil, 1845) = Spirifer tenticulum
  • C. whitneyi(Hall, 1858)

Cyrtospirifer is an extinct genus of brachiopods. The fossils are present in the Middle and Upper Devonian.

Contents

Taxonomy

Cyrtospirifer sp. with Cyrtina sp. and Eleutherokomma sp. Cyrtospirifer sp. Cyrtina sp., & Eleutherokomma sp..jpg
Cyrtospirifer sp. with Cyrtina sp. and Eleutherokomma sp.

It is likely that Tenticospirifer , that itself appeared during early Givetian, includes the ancestor of Cyrtospirifer. Cyrtospirifer first occurs in western Europe in the Late Givetian. Tenticospirifer has a relatively narrow hinge line and an inflated and thick shell in common with two of the oldest species known, C. verneuiliformis and C. aperturatus. This group dominated during the late Givetian, but was replaced by other species, such as C. syringothyriformis and C. verneuili which have wide hinge lines and thinner shells. [2]

Description

Cyrtospirifer has a medium to large sized shell, wider than long.

Reassigned species

Related Research Articles

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References

  1. 1 2 Rémy Gourvennec (2019). "Silurian-Devonian Spiriferida and Spiriferinida (Brachiopods) from the Tindouf Basin (Algeria)". Palaeontographica Abteilung A. 313 (4–6): 81–149. Bibcode:2019PalAA.313...81G. doi:10.1127/pala/2019/0083.
  2. Ma, Xueping; Day, Jed (2003). "Revision of Selected North American and Eurasian Late Devonian (Frasnian) species of Cyrtospirifer and Regelia (Brachiopoda)". Journal of Paleontology. 77 (2): 267–292. doi:10.1666/0022-3360(2003)077<0267:rosnaa>2.0.co;2.