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aqua 4(2)_Trimma 4 n. sp.

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SINGLE PAPER

Volume 4, Issue 2 – December 2000

Richard Winterbottom: Four new species of Trimma (Gobiidae), from the Indian and Western Pacific Oceans, pp. 57-66

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Description

SINGLE PAPER

Volume 4, Issue 2 – December 2000

Richard Winterbottom: Four new species of Trimma (Gobiidae), from the Indian and Western Pacific Oceans, pp. 57-66

Abstract

Four new species of the genus Trimma are described: Trimma anaima is a small species found in both Indian and western Pacific oceans. Trimma anaima has no scales in the predorsal midline, no interorbital or postorbital trenches, unbranched fifth pelvic fin-ray, and four small dark saddles over the dorsal midline. Trimma bisella, to date found only at Mauritius, has no scales in the predorsal midline, an interorbital trench, unbranched fifth pelvic fin ray, and two white saddles on the caudal peduncle. Trimma halonevum has predorsal scales, a moderate and steep-sided interorbital trench, and a fifth pelvic fin ray with a single dichotomous branch. It is salmon-coloured with red-brown and yellow spots on the head and body. Trimma halonevum has a wide distribution in the western Pacific ad has been found in the Indian Ocean at Christmas Island and the Maldives. Trimma omanensis has a crescent-shaped bar on the posterior edge of the pectoral base, head and predorsal midline naked, well-developed interorbital and postorbital trenches, a fifth pelvic fin ray which branches twice, and has to date only been found in the Gulf of Oman.

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