Baryancistrus isaaci
Baryancistrus isaaci de Oliveira & Rapp Py-Daniel, 2025
photo by de Oliveira, R.R. et al., 2025


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Family:  Loricariidae (Armored catfishes), subfamily: Hypostominae
Max. size:  26.99 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  South America: Brazil.
Diagnosis:  Dorsal spines (total): 2-2; Dorsal soft rays (total): 7-7; Anal soft rays: 4-4. This species is distinguished from its congeners by the following set of characters: large and yellow dots, larger than pupil and distant from each other; abdominal area covered by plates; dorsal-fin posterior membrane reaching or almost reaching the preadipose plate, leaving just one plate between the membrane and the preadipose plate; distance between the dorsal and adipose fins 0.0-2.5% of SL; postdorsal length 23.2-26.2% of SL; lack of a yellow-orange bar on the distal border of dorsal and caudal fins in juveniles and adult specimens; and orbit diameter 18.5-26.0% of HL (Ref. 138404).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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