Mean number of anal rays: 25.6 + 0.45 in Kemarat,25.2 f 0.49 in
of anal rays is somewhat lower in stigmabracium, b:ut. the difference is small and the overlap of extreme values is large. The only morphological difference between both species is the constant presence, in stigmabrachium, of a large and intensive blackish spot in the middle of the pectoral fin. This character is so constant that I accept stigmabrachium as a distinct species. Field and
genetical studies are necessary in order to verify its reproductive isolation.