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Karyotype analyses revealed that three species of cyprinid fishes from Thailand, Garra cambodgiensis, G. fasciacauda and G. notata, have the same diploid chromosome number of 2n = 50. However, they have different karyotype formulae. The karyotype formula of G. cambodgiensis is 10 metacentric (m) + 6 submetacentric (sm) + 2 subtelocentric (st) + 7 acrocentric (T) and the fundamental chromosome arm number (NF) is 82. G. fasciacauda is 9M + 7SM + 1ST + 8T and NF = 84, whilst G. notata is 10M + 5SM + 10T and NF = 80. This is the first report.
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