Common shovelnose ray

The common shovelnose ray, giant shovelnose ray or giant guitarfish (Glaucostegus typus) is a species of fish in the Rhinobatidae family found in the central Indo-Pacific, ranging from India to the East China Sea, Solomon Islands and northern Australia.[1][2][3] It is found in shallow coastal areas to a depth of at least 100 m (330 ft), including mangrove, estuaries and reportedly also in freshwaters.[1][2][3] It reaches up to 2.7 m (8.9 ft) in length, and is greyish-brown to yellowish-brown above with a paler snout.[3]

Common shovelnose ray

Critically Endangered  (IUCN 3.1)[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Order:
Rhinopristiformes
Family:
Glaucostegidae
Genus:
Glaucostegus
Species:
G. typus
Binomial name
Glaucostegus typus[2]
(Anonymous, referred to E. T. Bennett, 1830)

This species has been tested for colour vision using choice experiments that control for brightness. It was the first rigorous behvioural evidence for colour vision in any elasmobranch.[4]

References
  1. Kyne, P.M., Rigby, C.L., Dharmadi, Gutteridge, A.N. & Jabado, R.W. 2019. Glaucostegus typus. The IUCN Red List of Threatened Species 2019: e.T104061138A68623995. https://doi.org/10.2305/IUCN.UK.2019-2.RLTS.T104061138A68623995.en. Downloaded on 25 July 2019.
  2. Froese, Rainer and Pauly, Daniel, eds. (2017). "Glaucostegus typus" in FishBase. July 2017 version.
  3. Last; White; de Carvalho; Séret; Stehmann; Naylor, eds. (2016). Rays of the World. CSIRO. p. 116. ISBN 9780643109148.
  4. Van-Eyk, S. M.; Siebeck, U. E.; Champ, C. M.; Marshall, J.; Hart, N. S. (2011). "Behavioural evidence for colour vision in an elasmobranch" (PDF). The Journal of Experimental Biology. 214 (24): 4186–4192. doi:10.1242/jeb.061853. PMID 22116761.


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