[quote=”Christian Hinz” post=49](…) it would be astonishing that the species Parosphromenus bintan with a very large distribution area (meantime we know about bintan like types from Sumatra, Riau Archipel, south and west Borneo and Westmalaysia) don’t develop local forms.[/quote]
Yes, that is certainly true. Or in other words: It is highly probable that such a widespread species has developed quite some variations in isolated regions of its home range.
But one can formulate another question: P. bintan was described as the first species of many similar species. At the time of it’s description we all were not convinced that there are so many similar species. Today, the picture has changed completely. Would the describer describe bintan the same way if he had to do (or to revise?) it nowadays? Would he freely ascribe such a widespread distribution to a single species? Meanwhile he is and we are convinced that Parosphromenus-species have generally or mostly a much more limited distribution. Therefore I think that the status of bintan must probably be questioned fundamentally. At least the hypothesis of its widespread ocurrence.