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12 June 2009 A New Species of Mystus from Myanmar (Siluriformes: Bagridae)
Heok Hee Ng, Maurice Kottelat
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Mystus cineraceus, new species, is described from the Irrawaddy River drainage in northern Myanmar. It is distinguished from congeners in having a unique combination of a long-based adipose fin (40.9–45.9% SL) that contacts the base of the last dorsal-fin ray anteriorly, a color pattern consisting of a uniform brownish-gray body with a diffuse dark midlateral line and a diffusely dark tympanic region (very indistinct in some individuals), 13–15 rakers on the first gill arch, dorsal-fin spine length 10.9–13.4% SL, body depth at anus 20.7–23.4% SL, head length 24.1–27.2% SL, maxillary barbel reaching to middle of anal-fin base (247.4–345.0% HL), absence of a black spot at the base of the dorsal-fin spine and at the base of the caudal fin, and cranial fontanel reaching the base of the supraoccipital spine. The issues surrounding the identification of M. bleekeri, a species from India similar to M. cineraceus, are also discussed.

2009 by the American Society of Ichthyologists and Herpetologists
Heok Hee Ng and Maurice Kottelat "A New Species of Mystus from Myanmar (Siluriformes: Bagridae)," Copeia 2009(2), 245-250, (12 June 2009).
Received: 6 June 2008; Accepted: 1 October 2008; Published: 12 June 2009

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