Auchenipterus ambyiacus
4185, Rio Inambari (Madre de Dios Dr.), elevation 311 m, TCEP 04-51

Gelanoglanis
(photographed at night with flash - melanophores constricted)
ANSP 180723, 35.8 mm SL
Rio Inambari (Madre de Dios Dr.), elevation 311 m, TCEP 04-51

Gelanoglanis
(photographed during overcast day - melanophores dilated)
4081, Rio Madre de Dios at Isla Rolin (Madeira Dr.), elevation 164 m, TCEP 04-52

Tatia
Rio Manuripe (Ortón-Madre de Dios Dr.), elevation 165 m, TCEP 04-53

Tatia
4812, Rio Nusiniscato (Inambari-Madre de Dios Dr.), elevation 444 m, TCEP 04-48