Thank you for the clarifying response, Bartian.
The question why someone might want Parosphromenus is worth a new topic. There are numerous kinds of wonderful and interesting fish …, as there are for ex. Sphaerichthys osphromenoides. Having a small group of chocolate gourami’s, I thought the Licorice Gourami would perfectly suit as company.
Gathering details on different sites and forums, I finally abandoned that idea. The Parosphromenus-project made me understand that these species are rare and threatened.
While reading, my enthusiasm has been growing spontaneously. Still having another, well installed tank, I’ve decided to keep Licorice gourami’s isolated, perhaps only with some schrimps.