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Cyanocharax obi  Casciotta, Almirón, Piálek & ?í?an, 2012

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Cyanocharax obi
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drawing shows typical fish in this Family.

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

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Characidae (Characins) > Stevardiinae
Etymology: obi: Named from a Guaraní word obi, meaning blue, in allusion to the ground color of the body.

Environment / Climate / Range Ecology

Freshwater; benthopelagic.   Subtropical

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

South America: tributaries of the río Paraná basin in Argentina.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 5.9 cm SL male/unsexed; (Ref. 91033)

Short description Morphology | Morphometrics

Vertebrae: 37. Distinguished by the following combination of characters: anal fin with 22-24 (mode=24) branched rays; body depth at dorsal-fin origin 34.5-40.8 % SL (mean=37.9 % SL); nearly straight distal border of anal fin in matures males; and lateral line interrupted or with alternated series of perforated and non perforated scales. Other characters useful to diagnose this species include the following: 7-14 sheath scales on anal-fin base; anal-fin base length 2.9-3.4 in SL; interorbital width 2.7-2.9 in HL; 34-38 scales on longitudinal series; horizontal eye diameter 35.9-42.1% SL; snout length 24.0-27.3 % HL; upper jaw length 42.0-46.9% HL; maxillary teeth 3-6; pelvic-fin length 14.5-18.1% SL; snout to pelvic-fin origin 44.4-50.6% SL; snout to anal-fin origin 59.4-65.3% SL; snout to pelvic-fin origin 44.4-50.6% SL (Ref. 91033).

Biology     Glossary (e.g. epibenthic)

The localities where the species were found had a turbid and rapidly flowing water after heavy rain. The bottom is composed of mud, sand and stones (Ref. 91033).

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

Main reference Upload your references | References | Coordinator | Collaborators

Casciotta, J., A. Almirón, L. Piálek and O. ?í?an, 2012. Cyanocharax obi, a new species (Characiformes: Characidae) and the first record of the genus from tributaries of the río Paraná basin, Argentina. Zootaxa 3391:39-51. (Ref. 91033)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




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Internet sources

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

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00619 - 0.03534), b=2.90 (2.68 - 3.12), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.0   ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  .
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .