Thank you for all the replies. I think I forgot to mention that those fotos are taken with flash to show her pattern a bit better. Below is a pic that shows her true colour and a close up of her mouth/barbels, if that offers more help. Dorsomaculatus seems to be a good option, only thing is that siz...

I finally decided to register here and ask you what do you think this syno is? I bought her few years ago as a rescue. She is around 24cm SL and my guess is that she is either S. nigrita or rebeli. I'm pretty confident that she is not a hybrid but who knows.