[helene schoubye]

Yes, that sounds right.
You can see a little bit about sp. blue line here https://parosphromenus-project.org/en/blue-line.html
The sp. blue line and the other that Peter Finke is mentioning is quite often discussed here in the forum, so I am sure you will also be able to find more on them in forum.
It was a form which at some time or maybe yet sometimes is imported in larger numbers, – and they are yet to be fully described, – thats the reason we still have to call them sp.
Unfortunately fish which are caught in Sumatra can often be mixed (from different rivers or areas) and that makes it difficult to precisely identify them. But sp. blue line or sp. sentang are really beautiful species, – but whether there is one or more sp. blue line species we dont really know yet.
Not being deissneri is not unusual at all 🙂 , in fact deissneri is unfortunately only represented now in Europe by one single pair which unfortunately isnt breeding for some reason.