Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Heptapteridae
Etymology: Rhamdia: Brazilian vernacular name, Nhamdia/Jamdia (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
South America: Tocantins River basin, Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 23.8 cm SL male/unsexed; (Ref. 36914)
Morphology | Morphometrics
(total): 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.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Silfvergrip, A.M.C., 1996. A systematic revision of the Neotropical catfish genus Rhamdia (Teleostei, Pimelodidae). Stockholm University and Swedish Museum of Natural History. 156 pp. + 8 pls. (Ref. 50029)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00759 (0.00349 - 0.01649), b=2.99 (2.81 - 3.17), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.7 ±0.4 se; Based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (19 of 100) .