Rhamdia itacaiunas Silfvergrip, 1996

Family:  Heptapteridae (Three-barbeled catfishes)
Max. size:  23.8 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  South America: Tocantins River basin, Brazil.
Diagnosis:  Dorsal spines (total): 1-1; Dorsal soft rays (total): 6-6. Rhamdia itacaiunas is diagnosed from all congeners by the pectoral fin spine with serrations on both sides; caudal fin upper lobe pointed and longer than lower lobe; mouth deeply cleft to near the vertical at the anterior margin of the eye; eyes in advanced position, distinctly closer to the snout than to the operculum hind margin; adipose fin 23.3-28.4% of SL or 96.2-127% of HL; maxillary barbel 41.2-53.8% of SL or 190-231% of HL; broad tooth plates.
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


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