Hi Helene,
I can not speak danish, but I can read a little bit. I know some words in danish/norwegian and compare the other words with german and english. I hope I will understand a little bit 🙂
I found this work, while I was searching for some articles about Parosphromenus via google scholar. I found some more articles from springer link, but they want money for the articles if you are not locked in. But I hope I can search and download the articles at the university in a few days.
I found one article for free about phylogenetic relationships of Labyrinth fishes. I dont have the link but the citation is:
Rüber, L., Britz, R. and R. Zardoya (2006): Molecular Phylogenetics and Evolutionary Diversification of Labyrinth Fishes (Perciformes: Anabantoidei) – Syst. Biol. 55(3): 374-397