Which Form of Parosphromenus nagyi

[Marius]

Hello!

This is my first post in this forum. I have a group of Parosphromenus nagyi. Can you help me to identify the type of nagyi? It can maybe Kuantan, but i am not really sure. The pictures are not very good. Sorry for that.
Thanks a lot and nice greetings from Germany, Brandenburg.

Marius

[helene schoubye]

If you look in our species index under nagyi,- in the smaller images below in the text – I would also say it might be Kuantang, or a form like that. As far as I understand the broad band in the tail fin of the Kuantang is more white than blue, where Cherating is blue.
As there still are probably more details which should be in place in order to make a correct id, we will wait for people who are more certain than me 🙂 .. but I would say you may be right

[Peter Finke]

Helene describes it fully correctly (only the name of the central town is to be spelled Kuantan, no “g” at the end). And the photos make it evident that you have the Kuantan-type. It’s the type of the original descriptions. The most prominent feature is the relatively short tail (most prominently in the male animal, with rays extending beyond the end of the fin) and – especially – the whitish band in the tail. In other forms (esp. Cherating) this band is blueish or greenish the same way as in the dorsal or the anal fins. There is no colour dofference in this respect. Because of the rather widespread home-range we have other forms (Pekan Nenasi or other settlements, see species account) that seem to be optically identical with the first or the second. Therefore our hitherto knowledge is that there are only two easily discernable forms, the two I named. And the most easy mark of identification is the colour of that striking band in the caudal.

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