Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Loricariidae
(Armored catfishes) > Hypostominae
Etymology: Guyanancistrus: Composed from Guyana + see under Ancistrus; megastictus: The specific name megastictus is derived from the Ancient Greek mega (large) and stictos (spotted), in reference to the presence of very large size spots on body and fins.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
South America: a small forest tributary of the Upper Maroni River Basin, Massif du Mitaraka in French Guiana.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.3 cm SL male/unsexed; (Ref. 116863)
Morphology | Morphometrics
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Fisch-Muller, S., J.H.A. Mol and R. Covain, 2018. An integrative framework to reevaluate the Neotropical catfish genus Guyanancistrus (Siluriformes: Loricariidae) with particular emphasis on the Guyanancistrus brevispinis complex. Plos ONE 13(1):e0189789. (Ref. 116863)
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
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01698 (0.00778 - 0.03707), b=2.92 (2.74 - 3.10), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .