Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Hyphessobryconinae
Etymology: Hyphessobrycon: Greek, hyphesson, -on, -on = a little smaller + Greek, bryko = to bite (Ref. 45335); mapinguari: Name 'mapinguari in reference to Mapinguari, a mythic creature and the guardian of the forest from the Brazilian folklore of the tribes of the Amazon rainforest.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
Sputh America: Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.5 cm SL male/unsexed; (Ref. 137536)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 8 - 9; Anal soft rays: 23 - 27. This species is distinguished by the following set of characters: elongated dorsal fin in adult males; lacking hooks on fins of mature male specimens; dark caudal-peduncle blotch absent; 23-27 branched anal-fin rays; 6-7 teeth in the inner series of the premaxilla; 6-7 longitudinal scale rows between dorsal-fin origin and lateral line; 14 circumpeduncular scales; the inner row of premaxillary teeth tetra- or pentacuspid; red color at the dorsal portion of the iris not reaching the margin of the pupil present; red to orange caudal-peduncle blotch present; dark pigmentation on dorsal-fin interradial membrane present; chevron-shaped bars on the flank absent; six teeth in the inner series of the premaxilla; chalky-white pigmentation at the tip of the first three to six dorsal- and anal-fin rays absent; single, vertically elongated dark humeral blotch with diffuse margins (Ref. 133120).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
This species inhabits streams with slow-flowing, clear water, and minimal riparian vegetation composed of marginal grasses (Ref. 137536).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Pastana, M.N.L, G.M. Dutra, W.M. Ohara, T.F. Teixeira and N.A. Menezes, 2025. Description of a new species of Hyphessobrycon (Characiformes: Acestrorhamphidae) from Rio Madeira, a Greatly Impacted Region of the Amazon Rainforest, Apuí, Brazil. Ichthyol. Herpetol. 113(2):301-312. (Ref. 137536)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic level (Ref.
69278): 2.9 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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