That’s interesting, Bartian: three species, obviously all of them originating from Sumatra (indicated by the sumatranus, which are rarely exported). This may be a hint that the locations of the catches are not those of the usual “blue line” and spec. Sentang, and this could strengthen the hypothesis that gunawani is/was one of the three.
Surely, sumatranus are very interesting themselves, since the species is unique in its courtship behaviour with vertical postures in both (!) sexes, far more extreme than that of the both species ornaticauda and parvulus. As we wrote in the Hallmann/Finke book, I think this is an extremely interesting species from the phylogenetic point of view, and from that of evolutionary relationships to the other Paros, too. In any case, we should try to build a bigger stock again in our project! Those of us who can get hold of one or two pairs should breed them at any rate.
But your description of the third form is the most interesting of all: “stout body, shorter fins and somewhat different colouration”. This seems to indicate gunawani, indeed. Therefore, we should try to get hold of all individuals. There should be both males and females, however, differentiated in the usual way by the more pointed dorsal of the males and the colourless fins of the females.
It is to be assumed that the mix has been performed in Sumatra already by the catchers who caught fish in different habitats und threw them together into one batch in order to enlarge the numbers and without realizing that it were different species. They often do so, but it is rarely this clear that different species are involved.
It is further to be assumed that this mixture will appear more or less everywhere in Europe where fish of this import are sold in pet shops. For instance, the fish that Michael Kotzulla bought in Germany are probably belonging to different species, too. I should not exclude the same for the fish of Helene and others.
So, your description seems to indicate that there have been real gunawani in this import. It’s a pity that this has not been detected by Ruinemans (and possible other resellers) in order to separate them and maximize the individuals of each species. So, the result is probably a mixture everywhere and the possibility of getting pure gunawani and pure sumatranus was minimized.