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DOI: http://dx.doi.org/10.11646/zootaxa.3752.1.13

Dipturus amphispinus sp. nov., a new longsnout skate (Rajoidei: Rajidae) from the Philippines

PETER R. LAST, MOONYEEN ALAVA

Abstract


A new long-snouted skate, Dipturus amphispinus sp. nov., is formally described based on material caught in the Sulu Sea and later acquired from fish markets of the central and southern Philippines. It differs from its congeners in the western North Pacific, apart from D. wuhanlingi (East and South China Seas), in having a variably-defined, parallel row of posterolaterally directed lumbar thorns, and well-developed scapular thorns on each side of the disc. However, the paired rows of lumbar thorns are better defined in Dipturus amphispinus sp. nov. than in D. wuhanlingi, and these species also differ in some aspects of their morphometrics, meristics and squamation. Dipturus amphispinus sp. nov. displays marked sexual dimorphism with adult males having a relatively broader mouth, much longer teeth, a relatively shorter snout, head and disc, a taller first dorsal fin, and a proportionally longer posterior pelvic-fin lobe and tail, than adult-sized females.

 


Keywords


Rajidae, skate, Dipturus amphispinus, new species, Sulu Sea, Philippines

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References


Alcock, A.W. (1899) A descriptive catalogue of the Indian deep-sea fishes in the Indian Museum. Being a revised account of the deep-sea fishes collected by the Royal Indian marine survey ship ‘Investigator’. Calcutta. Deep-sea Fishes Indian Museum, 211 pp.

Beebe, W. & Tee-Van, J. (1941) Eastern Pacific expeditions of the New York Zoological Society. XXVIII. Fishes from the tropical eastern Pacific. [From Cedros Island, Lower California, south to the Galápagos Islands and northern Peru.] Part 3. Rays, Mantas and Chimaeras. Zoologica (N. Y.), 26, 245–280.

Bigelow, H.B. & Schroeder, W.C. (1958) Four new rajids from the Gulf of Mexico. Bulletin of the Museum of Comparative Zoology, 119, 201–233.

Chu, Y.T. (1960) Cartilaginous fishes of China. Scientific Press, Peiping, 225 pp.

Compagno, L.J.V., Last, P.R., Stevens J.D. & Alava, M.N.R. (2005) Checklist of Philippine Chondrichthyes. CSIRO Marine Laboratories Report, 243, 1–103.

Ebert, D.A. & Compagno, L.J.V. (2007) Biodiversity and systematics of skates (Chondrichthyes: Rajiformes: Rajoidei). Environmental Biology of Fishes, 80, 111–124.
http://dx.doi.org/10.1007/s10641-007-9247-0

Garrick, J.A.F. & Paul, L.J. (1974) The taxonomy of New Zealand skates (suborder Rajoidea), with descriptions of three new species. Journal of the Royal Society of New Zealand, 4, 345–377.
http://dx.doi.org/10.1080/03036758.1974.10419402

Hubbs, C.L. & Ishiyama, R. (1968) Methods for taxonomic study and description of skates (Rajidae). Copeia, 1968 (3), 483–491.
http://dx.doi.org/10.2307/1442016

Ishiyama, R. (1955) Studies on the rays and skates belonging to the family Rajidae, found in Japan and adjacent regions. 6. Raja macrocauda, a new skate. Journal of the Shimonoseki Collection of Fishes, 4, 43–51.
http://dx.doi.org/10.2307/1440023

Ishiyama, R. (1958) Studies on the rajid fishes (Rajidae) found in the waters around Japan. Journal of the Shimonoseki Collection of Fishes, 7, 191–394.

Jeong, C.-H. & Nakabo, T. (2008) Dipturus wuhanlingi, a new species of skates (Elasmobranchi; Rajidae) from China. Ichthyological Research, 55 (2), 183–190.
http://dx.doi.org/10.1007/s10228-007-0031-0

Jordan, D.S. & Fowler, H.W. (1903) A review of the elasmobranchiate fishes of Japan. Proceedings of the U.S. National Museum, 26, 593–674.
http://dx.doi.org/10.5479/si.00963801.26-1324.593

Last, P.R. (2008) New short-snout members of the skate genus Dipturus (Rajoidei: Rajidae) from Australian seas. In: Last, P.R., White, W.T., Pogonoski, J.J. & Gledhill, D.C. (Eds.), Descriptions of new Australian skates (Batoidea: Rajoidei). CSIRO Marine & Atmospheric Research Paper 021, pp. 53–98.

Last, P.R. & Gledhill, D.C. (2007) The Maugean skate, Zearaja maugeana sp. nov. (Rajiformes: Rajidae)—a micro-endemic, Gondwanan relict from Tasmanian estuaries. Zootaxa, 1494, 45–65.

Last, P.R., White, W.T. & Pogonoski, J.J. (2008b) New skates of the genus Dipturus (Rajoidei: Rajidae) from Australian seas. In: Last, P.R., White, W.T., Pogonoski J.J. & Gledhill, D.C. (Eds.), Descriptions of new Australian skates (Batoidea: Rajoidei). CSIRO Marine & Atmospheric Research Paper 021, pp. 9–52.

Last, P.R., White, W.T., Pogonoski, J.J. & Gledhill, D.C. (2008a) New Australian skates (Batoidea: Rajoidei)—background and methodology. In: Last, P.R., White, W.T., Pogonoski, J.J. & Gledhill, D.C. (Eds.), Descriptions of new Australian skates (Batoidea: Rajoidei). CSIRO Marine & Atmospheric Research Paper 021, pp. 1–8.

McEachran, J.D. & Fechhelm, J.D. (1982) A new species of skate from western Australia with comments on the status of Pavoraja Whitley, 1939 (Chondrichthyes: Rajiformes). Proceedings of the Biological Society of Washington, 95, 1–12.

Macleay, W. (1884) Some results of trawl fishing outside Port Jackson. Proceedings of Linnean Society New South Wales, 8, 457–462.

Ogilby, J.D. (1910) On some new fishes from the Queensland coast. Endeavour Series, 1, 85–139.

Séret, B. (1989) Deep water skates of Madagascar. Part 3. Rajidae (Pisces, Chondrichthyes, Batoidea). Raja (Dipturus) crosnieri sp. n. Cybium, 13, 115–130.

Smith, J.L.B. (1964) Fishes collected by Dr. Th. Mortensen off the coast of South Africa in 1929, with an account of the genus Crurirajia Bigelow & Scroeder, 1954 in South Africa. Videnskabelige Meddelelser Naturhistorisk Forening i København, 126, 283–300.

Wallace, J.H. (1967) The batoid fishes of the east coast of southern Africa. Part 3: skates and electric rays. Investigative Reports of the Oceanographic Research Institute of Durban, 17, 1–62.

Whitley, G.P. (1939) Taxonomic notes on sharks and rays. Australian Zoologist, 9, 227–262.

Whitley, G.P. (1940) The fishes of Australia. Part I. The sharks, rays, devil-fish, and other primitive fishes of Australia and New Zealand. Royal Zoological Society of New South Wales, Sydney, 280 pp.


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