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The genusAcanthopsoides Fowler, 1934 is revised;Neacanthopsis Smith, 1945 is placed in the synonymy ofAcanthopsoides. In addition toAcanthopsoides gracilis Fowler, 1934 andAcanthopsoides gracilentus (Smith, 1945), four new species are described in the genus. These areA. delphax of the Salween, Chao Phraya and Mekong river basins,A. hapalias of the Mekong River basin,A. molobrion from peninsular Thailand, Malaysia and Borneo, andA. robertsi from the Kapuas River basin and adjacent areas, Borneo. The known distribution of the genus includes most of Southeast Asia.Acanthopsoides gracilis, A. gracilentus, and Adelphax are sympatric: Amolobrion and A. robertsi in the Kapuas River basin andA. gracilentus, A. delphax andA. hapalias in the Mekong River basin may be also. The increase in the diversityof Acanthopsoides recognized herein may be indicative of the level of the unknown diversity of the Southeast Asian freshwater fish fauna in general. |
