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Hemigrammus arua  Lima, Wosiacki & Ramos, 2009

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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Characidae (Characins) > Incertae sedis
Etymology: Hemigrammus: Greek, hemi = half + Greek, gramma = letter, signal (Ref. 45335);  arua: Named for its type locality, lago São Francisco do Alto Aruã, A noun in apposition.

Environment / Climate / Range Ecology

Freshwater; benthopelagic; depth range 1 - 2 m (Ref. 81198).   Tropical

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.0 cm SL male/unsexed; (Ref. 81198)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 11-12; Anal soft rays: 21 - 25; Vertebrae: 31. Distinguished from all species of the genus, except Hemigrammus stictus (Durbin), by having a large single humeral spot situated from fifth-sixth to posterior margin of eighth-tenth lateral line scales. Differs from Hemigrammus stictus by having a humeral spot roughly rectangular, higher than wide, with a pronounced upper, anteriorly-oriented extension, conferring an inverted-comma shape to the blotch (vs. humeral spot roughly rounded, not presenting an inverted-comma shape), and life color pattern presenting unpaired fins orange reddish (vs. caudal fin and caudal peduncle bright red in life, remaining fins translucent) (Ref. 81198).

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

South America: headwaters of the rio Arapiuns, rio Tapajós basin, and from the adjacent headwaters of the igarapé Juruti Grande, rio Amazonas in Brazil.

Biology     Glossary (e.g. epibenthic)

Inhabits shallow marginal areas, with abundant aquatic macrophytes, both emergent and non-emergent (Ref. 81198). Gut contents of four specimens include insect larvae, winged insects and plant matter (Ref. 81198).

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

Main reference Upload your references | References | Coordinator | Collaborators

Lima, F.C.T., W.B. Wosiacki and C.S. Ramos, 2009. Hemigrammus arua, a new species of characid (Characiformes: Characidae) from the lower Amazon, Brazil. Neotrop. Ichthyol. 7(2):153-160. (Ref. 81198)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02089 (0.00810 - 0.05390), b=3.00 (2.78 - 3.22), based on LWR estimates for this Subfamily-body shape (Ref. 93245).
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months ().
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .