Glaucostegus

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Glaucostegus
Glaucostegus typus.jpg
Giant guitarfish (G. typus)
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Subclass:
Elasmobranchii
Order:
Rhinopristiformes
Family:
Glaucostegidae

Last, Séret & Naylor, 2016
Genus:
Glaucostegus

Bonaparte, 1846

Glaucostegus, also known as giant guitarfishes, is a genus of large Indo-Pacific rays, with a single species, Glaucostegus cemiculus, in the East Atlantic, and Mediterranean.[1] They were formerly classified in the family Rhinobatidae but are now recognized as a distinct family, Glaucostegidae.[2]

Their upperparts are uniform pale yellowish, brownish or greyish, and the nose is pale. Most are large, reaching 1.7–3 m (5.6–9.8 ft) in length depending on the exact species involved, except for the small G. obtusus that is less than 1 m (3.3 ft).[1]

Species[]

There are six recognized species, all of which are classified as critically endangered:[2][3]

  • Glaucostegus cemiculus (Geoffroy St. Hilaire, 1817) (Blackchin guitarfish)
  • Glaucostegus granulatus Cuvier, 1829 (Sharpnose guitarfish)
  • Glaucostegus halavi Forsskål, 1775 (Halavi guitarfish)
  • Glaucostegus obtusus (Müller & Henle, 1841) (Widenose guitarfish)
  • Glaucostegus thouin (Anonymous, 1798) (Clubnose guitarfish)
  • Glaucostegus typus (E. T. Bennett, 1830) (Giant guitarfish)

References[]

  1. ^ a b Last; White; de Carvalho; Séret; Stehmann; Naylor, eds. (2016). Rays of the World. CSIRO. pp. 110–116. ISBN 9780643109148.
  2. ^ a b Last, P.R.; Séret, B.; Naylor, G.J.P. (2016). "A new species of guitarfish, Rhinobatos borneensis sp. nov. with a redefinition of the family-level classification in the order Rhinopristiformes (Chondrichthyes: Batoidea)". Zootaxa. 4117 (4): 451–475. doi:10.11646/zootaxa.4117.4.1. PMID 27395187.
  3. ^ Froese, Rainer and Pauly, Daniel, eds. (2017). Species of Glaucostegus in FishBase. July 2017 version.


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