The new photos actually strengthen my belief that it is a cruzi-subcomplex species close to A. sp. Nanay: the shape of the dorsal fin, the wide abdominal stripes and the yellow pectoral fins all point towards this. As pointed out by Mike, the split in bar #6 is of course typical for eunotus-subcomplex species, but (as shown in the photo above) it can also be found in fiish that we tend to call “A. sp. Nanay”. If I had to name this fish I would probably call it A. cf. sp. Nanay.