Identity and locality
Aphanotorulus/Squaliforma cf. emarginatus complex
Rio Tapajós, Brazil
Diagnostic evidence and naming
Specialist field/trade history lists L131 as a distinct historic river-label inside the thresher complex, alongside L011, L108, L116 and L153. A code for local specimens is not a scientific-species description. A specialist genus-level location crosswalk distinguishes L131 Rio Tapajós from L116 Trombetas and L153 Venezuelan Orinoco material while grouping these provisionally near cf. emarginatus. Equal red-fin appearance does not validate identical taxa.
Breeding and genetics limitations
No evidence of intentionally selected breeding founder or Mendelian trait documented by the original river-code assignment.
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.