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Issue: Vol. 3363 No. 1: 3 Jul. 2012
Type: Articles
Published: 2012-07-03
DOI: 10.11646/zootaxa.3363.1.3
Page range: 45–51
Abstract views: 67
PDF downloaded: 53

Phallostethus cuulong, a new species of priapiumfish (Actinopterygii: Atheriniformes: Phallostethidae) from the Vietnamese Mekong

Nagao Natural Environment Foundation, 3-10-10 Shitaya, Taito-ku, Tokyo 110-0004, Japan
College of Aquaculture and Fisheries, Can Tho University, 3-2 Street, Can Tho, Vietnam
College of Aquaculture and Fisheries, Can Tho University, 3-2 Street, Can Tho, Vietnam
Fish Atheriniformes Phallostethidae Phallostethus cuulong new species Vietnamese Mekong

Abstract

A new species of priapiumfish, Phallostethus cuulong, is described based on nine specimens collected from the Vietnam-ese Mekong. This is the third species of the genus, following the type species P. dunckeri (from Malay peninsula) and P.lehi (from northwestern Borneo), and distinguished from them by having: seven serrae on the second ctenactinium in adultmales (vs. five in P. dunckeri and eight in P. lehi); 25–26 caudal vertebrae (vs. 27 in P. dunckeri and 28 in P. lehi); approx-imately 5–19 teeth on paradentary (vs. 15–20 and 28 or more in P. dunckeri and P. lehi, respectively). All six examinedmales are dextral (vs. one and two known males are sinistral and dextral respectively in P. dunckeri, and all four knowmales are sinistral in P. lehi). Sexual dimorphism is also found in the number of precaudal vertebrae, i.e., 13–14 in males and 11–12 in females (vs. sexual dimorphism is not found in number of precaudal vertebrae of P. dunckeri and P. lehi).

References

  1. Grier, H.J. & Parenti, L.R. (1994) Reproductive biology and systematic of phallostethid fishes as revealed by gonad structure. Environmental Biology of Fishes, 41(1–4), 287–299.

    Parenti, L.R. (1989) A phylogenetic revision of the phallostethid fishes (Atherinomorpha, Phallostethidae). Proceedings of the California Academy of Sciences (Series 4), 46(11), 243–277.

    Parenti, L.R. (1996) Phylogenetic systematics and biogeography of phallostethid fishes (Atherinomorpha, Phallostethidae) of northwestern Borneo, with description of new species. Copeia, 1996(3), 703–712.

    Parenti, L.R. (2005) The phylogeny of atherinomorphs: evolution of a novel fish reproductive system. In: Uribe, M.C. & Grier, H.J. (Eds.) Viviparous Fishes. New Life Publications, Florida, pp. 13–30.

    Parenti, L.R. & Louie, K.D. (1998) Neostethus djajaorum, new species, from Sulawesi, Indonesia, the first phallostethid fish (Teleostei: Atherinomorpha) known from east of Wallace's Line. The Raffles Bulletin of Zoology, 46(1), 139–150.

    Regan, C.T. (1913) Phallostethus dunckeri, a remarkable new cyprinodont fish from Johore. Annals and Magazine of Natural History (Series 8), 12(72), 548–555.

    Regan, C.T. (1916) The morphology of the cyprinodont fishes of the subfamily Phallostethinae, with descriptions of a new genus and two new species. Proceedings of the General Meetings for Scientific Business of the Zoological Society of London, 1916 (1), 1–26, 4 pls.