Thanks for your answers,
I'm sure that is not a bocourti, becoase it´s a species that i have and is very different in body shape.
some of them have spangles on the area of opercle in bluish tones
What i find strange is the shape of the head, are they a hybrid of Parachromis with something else???
Does anyone have pictures of loiselli juveniles, or some link where you can see some photos