| molecular and morphological evidence supports the species status of the mahachai fighter betta sp. mahachai and reveals new species of betta from thailand. | two regions of mitochondrial (mt) dna, cytochrome c oxidase subunit 1 (coi) and 16s rrna, were sequenced in nine species of betta from thailand and indonesia. most species showed little intraspecific coi variation (adjusted mean = 0.48%) including the putative species betta sp. mahachai, but one species (betta smaragdina) included three lineages showing much greater divergence (7.03-13.48%) that probably represent overlooked species. these findings were confirmed by maximum likelihood analysis a ... | 2010 | 20646165 |