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Teleostei (teleosts) > Siluriformes (Catfishes) > Loricariidae (Armored catfishes) > Hypostominae
Etymology: Guyanancistrus: Composed from Guyana + see under Ancistrus.
More on authors: Heitmans, Nijssen & Isbrücker.

Issue
See Le Bail et al. (2000:236, fig.) for complementary description with biological observations and geographical distribution; 12S and 16S mitochondrial rRNA gene sequences used in a molecular phylogeny of Loricariidae by Montoya-Burgos et al. (1998: figs. 3,4,6 as Lasiancistrus niger).

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal. Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Atlantic coastal drainages of the Guianas, from Nickerie to Oyapock River basins.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 14.2 cm SL male/unsexed; (Ref. 36713)

The most ubiquitous, frequently occurring and abundant species of this genus. Occurs in all kinds of streams where the substrate is rocky and the water is flowing (Ref. 35381). Found in great numbers in zones of plunging waters (Ref. 27188). May be found together with Lithoxus in little forest creeks as well as in rapids (Ref. 35381).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Fisch-Muller, Sonia | Collaborators

Silva, G.S.C., F.F. Roxo and C. Oliveira, 2015. Two new species of Pseudancistrus (Siluriformes: Loricariidae) from the Amazon basin, northern Brazil. ZooKeys 482:21-34. (Ref. 99871)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Least Concern (LC) ; Date assessed: 27 October 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators

Ecology
Ecology

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance

Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics

Distribution
Countries
FAO areas
Ecosystems
Occurrences
Introductions
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Anatomy
Gill area
Brain
Otolith

Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)

Genetics
Genetics
Heterozygosity
Heritability

Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.

Outreach
Collaborators

Taxonomy
Common names
Synonyms
Morphology
Morphometrics
Pictures

References
References

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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01585 (0.00866 - 0.02902), b=3.02 (2.87 - 3.17), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Guyanancistrus brevispinis (Heitmans, Nijssen & Isbrücker, 1983)