Two new species of the genus Trimma (Percomorpha: Gobiidae) from western Thailand

Richard Winterbottom and Laura Southcott

aqua, International Journal of Ichthyology, pp. 69-76, Volume 13, Issue 2 – 08 November 2007


Two new species of the genus Trimma are described. Trimma fucatum is characterized by the presence of predorsal scales, two opercular scales (one ctenoid, one cycloid), an interorbital and a slight postorbital trench, no elongate dorsal spines, and one dichotomous branch in the fifth pelvic-fin ray. When alive, T. fucatum has three to four diffuse rows of orange to yellow blotches, smaller yellow spots on the caudal fin, and a distinctive narrow red bar on the preopercle. Preserved specimens have straw-yellow blotches on a brown background. Trimma sanguinellus is characterized by a lack of predorsal and opercular scales, the presence of interorbital trenches, a slightly elongate second dorsal spine, a fleshy ridge on the predorsal midline, and an unbranched fifth pelvic-fin ray. Freshly-caught specimens are uniformly red-orange. Specimens preserved in ethanol are straw-yellow. Both new species are currently known only from the eastern margin of the Indian Ocean. 

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SARUWATARI, T., LOPEZ, J. A., & PIETSCH, T. W. (1997) Cyanine blue: a versatile and harmless stain for specimen observation. Copeia, 1997: 840-841.

SANZO, L. (1911) Distribuzioine delle papille cutanee (organi ciatiformi) e suo valore sistematico nei Gobi. Mitteilungen aus der Zoologische Station zu Neapel, 20 (2): 251-328.

SUNOBE, T. & NAKAZONO, A. (1990) Polygynous mating system of Trimma okinawae (Pisces: Gobiidae) at Kagoshima, Japan with a note on sex change. Ethology, 84: 133-143.

WINTERBOTTOM, R. (2002) Two new species of Trimma (Gobiidae) from the central, western, and south Pacific. aqua, Journal of Ichthyology and Aquatic Biology, 5 (2): 45-52.

WINTERBOTTOM, R. (2003) A new species of the gobiid fish Trimma from the Western Pacific and Northern Indian Ocean coral reefs, with a description of its osteology. Zootaxa, 218: 1-24.

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