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DOI: http://dx.doi.org/10.11646/zootaxa.3936.2.4

Tetronarce cowleyi, sp. nov., a new species of electric ray from southern Africa (Chondrichthyes: Torpediniformes: Torpedinidae)

David A. Ebert, diane l. haas, MARCELO R. DE CARVALHO

Abstract


A new species of torpedo ray, Tetronarce cowleyi, sp. nov., is described from specimens collected from the southeastern Atlantic Ocean. The new species is placed in the genus Tetronarce based on a uniform dorsal coloration and absence of papillae around the spiracles. The new species is distinguished from its closest congeners, the North Atlantic Tetronarce nobiliana Bonnaparte, 1835, and southwestern Atlantic Tetronarce puelcha Lahille, 1926, by a combination of morphological characteristics including a shorter spiracular length, a proportionally greater head length as measured between snout margin and fifth gill openings, a proportionally greater preoral snout length, a uniform shiny black or dark gray dorsal surface, lacking any prominent markings, and a creamy white ventral color with dark edges in juveniles but fading with growth. Teteronarce cowleyi, sp. nov., is further distinguished from T. nobiliana by its more circular anterior disc shape (vs. relatively straight in T. nobiliana), fewer tooth rows (32/28 vs. 38–53/38–52 in T. nobiliana), greater mouth width (1.5–1.7 times as great as interorbital width vs. 0.5–0.6 times interorbital width in T. nobiliana), smaller distance between second dorsal and caudal fins (3.5–4.9% vs. 6.6–6.8% in T. nobiliana), and a clasper length extending nearly to lower caudal fin origin (claspers in T. nobiliana that extend only two-thirds distance between second dorsal and caudal fins). Teteronarce cowleyi, sp. nov., is known from Walvis Bay, Namibia to Algoa Bay, Eastern Cape, South Africa, at depths of 110 to 457 m.


Keywords


Tetronarce, electric ray, new species, Namibia, South Africa, Southeastern Atlantic Ocean

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References


Allué, C., Borruel, C., Lloris, D. & Rucabado, J.A. (1984) Datos pesqueros de la campaña “Benguella II”. In: Rucabado, J.A. & Bas, C. (Eds.), Resultados de las Expediciones Oceanográfico-Pesqueras “Benguela I” (1979) y “Benguela II” (1980) Realizadas en el Atlántico Sudoriental (Namibia). Vol. 9. Datos Informativos, Instituto de Investigaciones Pesqueras de Barcellona, pp. 85–190.

Barnard, K.H. (1925) A monograph of the marine fishes of South Africa. Part 1. Annuals of the South African Museum, 21, 1–418.

Barnard, K.H. (1947) A Pictorial Guide to South African fishes. Maskew Miller, Cape Town, xvii, 226 pp.

Bigelow, H.B. & Schroeder, W.C. (1953) The fishes of the western North Atlantic, Part II: sawfishes, skates, rays, and chimaeroids. Memoirs of the Sear Foundation for Marine Research, 2, 1–xv + 1–514.

Bini, G. (1967) Atlante dei pesci delle coste italiane. I. Leptocardi, Ciclostomi, Selaci. Mondo Sommerso, Milano, 206 pp.

Capapé, C. & Desoutter, M. (1980) Nouvelles descriptions de Torpedo (Tetronacre ) nobiliana Bonaparte, 1835, et de Torpedo (Tetronarce) mackayana Metzelaar, 1919 (Pisces, Torpedinidae). Bulletin du Museum National d Histoire Naturelle de Paris, 4è Serie, n°2, Section A, 1, 325–342.

Carvalho, M.R. de (1999) A systematic revision of the electric ray genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae), and the higher-level phylogenetic relationships of the elasmobranch fishes (Chondrichthyes). PhD dissertation, The City University of New York, 735 pp.

Carvalho, M.R. de, Stehmann, M.F.W. & Manilo, L.G. (2002) Torpedo adenesis, a new species of electric ray from the Gulf of Aden, with comments on nominal species of Torpedo from the Western Indian Ocean, Arabian Sea and adjacent areas (Chondrichthyes: Torpediniformes: Torpedinidae). American Museum Novitates, 3369, 1–34.
http://dx.doi.org/10.1206/0003-0082(2002)369<0001:TAANSO>2.0.CO;2

Carvalho, M.R. de. (2015) Torpedinidae. In: Heemstra, P.C., Heemstra, E. & Ebert, D.A. (Eds.), Coastal Fishes of the Western Indian Ocean. Vol. 1. South African Institute for Aquatic Biodiversity, Grahamstown, South Africa. [in press]

Compagno, L.J.V. (1986) Family Torpedinidae. In: Smith, M.M. & Heemstra, P.C.(Eds.), Smith’s Sea Fishes. 1st Edition. Southern Book Publishers, Johannesburg, pp. 112–113.

Compagno, L.J.V. (1999) An overview of chondrichthyan systematics and biodiversity in southern Africa. Transactions of the Royal Society of South Africa, 54, 75–120.
http://dx.doi.org/10.1080/00359199909520406

Compagno, L.J.V. (2005) Checklist of living Chondrichthyes. In: Hamlett, W.C. (Ed.), Reproductive Biology and Phylogeny of Chondrichthyes. Science Publishers, Inc., New Hampshire, pp. 503–548.

Compagno, L.J.V., Ebert, D.A. & Cowley, P.D. (1991) Distribution of offshore demersal cartilaginous fish (class Chondrichthyes) off the west coast of southern Africa, with notes on their systematics. South African Journal of Marine Science, 11, 43–139.
http://dx.doi.org/10.2989/025776191784287664

Compagno, L.J.V., Ebert, D.A. & Smale, M.J. (1989) Guide to the Sharks and Rays of Southern Africa. Struik, Cape Town, 160 pp.

Ebert, D.A. (2014) Deep-sea cartilaginous fishes of the Indian Ocean. Volume 2. Batoids and Chimaeras. FAO Species Catalogue for Fishery Purposes. No. 8, Vol. 2. Rome, FAO. 129 pp.

Ebert, D.A., White, W.T., Ho, H-C, Last, P.R., Nakaya, K., Séret, B., Straube, N., Naylor, G.J.P. & Carvalho, M.R. de (2013) An annotated checklist of Taiwan Chondrichthyans. In: Carvalho, M.R. de, Ebert, D.A., Ho, H.-C., & White, W.T. (Eds.), Systematics and biodiversity of sharks, rays, and chimaeras (Chondrichthyes) of Taiwan. Zootaxa, 3752 (1), 279–386.
http://dx.doi.org/10.11646/zootaxa.3752.1.17

Fowler, H.W. (1936) The marine fishes of west Africa based on the collection of the American Museum Congo Expedition, 1909-15. Bulletin of the American Museum of Natural History, 70, 1–1493.

Fowler, H.W. (1941) The fishes of the groups Elasmobranchii, Holocephali, Isospondyli, and Ostariophysi obtained by United States Bureau of Fisheries Steamer Albatross in 1907 to 1910, chiefly in the Philippines and adjacent seas. Bulletin of the U.S. National Museum, 100, 1–879.

Haas, D.L. & Ebert, D.A. (2006) Torpedo formosa sp. nov., a new species of electric ray (Chondrichthyes: Torpediniformes: Torpedinidae) from Taiwan. Zootaxa, 1320, 1–14.

Lahille, F. (1928) Nota sobre unos peces elasmobranquios. Anales del Museo Nacional de Historia natural Bernardino Rivadvia, 34, 299–339, pls. 1–5.

Lloris, D. (1986) Ictiofauna demersal y aspectos biogeográficos de la costa sudoccidental de Άfrica (SWA/Namibia). Monografías de Zoología Marina, 1, 9–432.

Naylor, G.J.P., Caira, J.N., Jensen, K., Rosana, K.A.M., White, W.T. & Last, P.R. (2012) A DNA sequence-based approach to the identification of shark and ray species and its implications for global elasmobranch diversity and parasitology. Bulletin of the American Museum of Natural History, 367, 1–263.
http://dx.doi.org/10.1206/754.1

Norman, J.R. (1935) Coast fishes. 1. The South Atlantic (including the Cape Verde islands, West Africa, Ascension Islands, Tristan da Cunha and Gough Island). “Discovery” Report, 12, 1–58.

Smith, J.L.B. (1949) The sea fishes of southern Africa. Central News Agency, Cape Town, xviii + 550 pp.

Smith, J.L.B. (1965) The sea fishes of southern Africa. 5th Edition. Central News Agency, Cape Town, 580 pp.

Thompson, W.W. (1914) Catalogue of the fishes of the Cape Province (Part 1). Marine Biological Reports, 2, 132–167. [Cape Town]

Tortonese, E. (1957) Leptocardia, Ciclostomata, Selachii. Fauna d'Italia. Vol. 2. Bologna, Edizioni Calderini, 334 pp.

Turon, J.M., Rucabado, J., Lloris, D. & Macpherson, E. (1986) Datos pesqueros de las expediciones realizadas en aguas de Namibia durante los Anos 1981 a 1984 (“Benguela III” a “Benguela VII” y “Valdivia I”). In: Macpherson, E. (Ed.), Resultados de las Expediciones Oceanográfico-Pesqueras “Benguela III” (1981) a “Benguela VII” (1984) y “Valdivia I” realizadas en el Atlántico Sudoriental (Namibia). Vol. 17. Datos Informativos, Instituto de Ciencias del Mar, Barcelona, pp. 1–345.

Von Bonde, C. & Swart, D.B. (1923) The Platosomia (skates and rays) collected by the S.S. “Pickle”. Union of South Africa, Fisheries and Marine Biological Survey, Report (3), 1922, Special Report (5), 22 pp.


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