Identity and locality
Pterygoplichthys gibbiceps (Kner, 1854)
Rio Negro near Marabitanas type locality; original imports origin not proven
Diagnostic evidence and naming
The 2017 expert historical crosswalk supports L165 as gibbiceps from the Rio Negro region, while L083 Xingu form is taxonomically contested. Large dorsal fin and ornate body markings are not exclusive to one species. A historical 1997 Catfish of the Month records L165 with Pterygoplichthys gibbiceps and a Rio Negro original type locality. Expert sources conflict on whether Rio Xingu L083 belongs to that same named species or to P. xinguensis; this is not resolved by a shared dorsal-fin pattern.
Breeding and genetics limitations
Keep adult size/filtration and no-release conservation prominent; do not copy care limits from smaller cave-breeding plecos.
Original references
Links are research leads; they do not certify every statement. Check original taxonomy and date.
Public Discord research discussion
Follow the original forum topic. It is a discussion record, not independent scientific verification.