Rhynchobatus australiae

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Rhynchobatus australiae
Rhynchobatus syndey aquarium.jpg

Critically Endangered (IUCN 3.1)[1]
CITES Appendix II (CITES)[2]
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Order:
Rhinopristiformes
Family:
Rhinidae
Genus:
Rhynchobatus
Species:
R. australiae
Binomial name
Rhynchobatus australiae
Whitley, 1939

Rhynchobatus australiae, also called the white-spotted guitarfish, white-spotted wedgefish or bottlenose wedgefish, is a species of fish in the Rhinidae family.[1] It is found from shallow waters to a depth of at least 60 m (200 ft) in the Indo-Pacific, ranging from the East African coast and the Red Sea, to Taiwan, the Philippines and Australia.[3] It is part of a species complex that also includes the giant guitarfish, the broadnose wedgefish and possibly the smoothnose wedgefish.

R. australiae reaches about 3 m (10 ft) in length.[3] Juveniles and young adults are greyish or brownish above with a sparse covering of white spots and a black spot above each pectoral fin. There are three white spots above each black spot. Large adults are considerably darker, sometimes appearing almost black above, and the spots seen is younger individuals are typically not easily visible.[3]

Its tail fin has distinct upper and lower lobes, unlike the fiddler and shovelnose rays, where the lower lobe is reduced.[4]: 13, 65–69  Its snout is acutely pointed, merging into the flat triangular pectoral fins. Gills are on the underside of the head. The first (anterior) dorsal fin is in line with the pelvic fins, and there is a row of thorns along the dorsal midline.[4]: 67 

References[]

  1. ^ a b Kyne, P.M.; Rigby, C.L.; Dharmadi.; Jabado, R.W. (2019). "Rhynchobatus australiae". IUCN Red List of Threatened Species. 2019: e.T41853A68643043. doi:10.2305/IUCN.UK.2019-2.RLTS.T41853A68643043.en. Retrieved 17 November 2021.
  2. ^ "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  3. ^ a b c Last; White; de Carvalho; Séret; Stehmann; Naylor, eds. (2016). Rays of the World. CSIRO. pp. 68–75. ISBN 9780643109148.
  4. ^ a b Macbeth, W. G.; Vandenberg, M; Graham, K. J. (October 2008). "Identifying sharks and rays: A guide for NSW commercial fishers" (PDF). NSW Dept. of Primary Industries. Retrieved 25 January 2022.


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