Teleostei (teleosts) >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Oligosarcus: Greek, oligos = small + Greek arkos = anus (Ref. 45335).
Eponymy: Olivério Mário de Oliveira de Pinto (1896–1981) was a Brazilian ornithologist. [...] (Ref. 128868), visit book page.
Taxonomic Remarks
See Menezes,1987: 20 for diagnosis.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: upper Paraná basin.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.8 cm SL male/unsexed; (Ref. 111720)
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oyakawa, O.T., 1998. Catalogo dos tipos de peixes recentes do Museu de Zoologia da USP. I. Characiformes (Teleostei: Ostariophysi). Pap. Avuls. Zool. 39(23):443-507. (Ref. 27925)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
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Special reports
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01259 (0.00685 - 0.02315), b=3.15 (3.00 - 3.30), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
Trophic level (Ref. 69278) |
4.2 ±0.4 se; based on diet studies. |
Resilience (Ref. 120179) |
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.). |
Fishing Vulnerability (Ref. 59153) |
Low vulnerability (18 of 100). 🛈 |