Abstract-- I didn't pay for access to the article. This should find its way to other sources pretty quickly. Some who accessed the article are reporting the new name is Geophagus pyrocephalas-- translation: fire (or flame colored, red) head according to articles about the bird genus Pyrocephalus-- which I looked up since I don't speak Latin.
A new species of Geophagus (Teleostei: Cichlidae): naming a cichlid species widely known in the Aquarium hobby as “Geophagus sp. Tapajos Red head”

A new species of Geophagus (Teleostei: Cichlidae): naming a cichlid species widely known in the Aquarium hobby as “Geophagus sp. Tapajos Red head”