Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Characiformes
(Characins) > Characidae
(Characins) > Tetragonopterinae
Etymology: Tetragonopterus: Greek, tetra = four + Greek, gonia = angle + Greek, pteron = wing, fin (Ref. 45335); denticulatus: The specific name denticulatus, from Latin, refers to the presence of small teeth on the dentary, a condition distinguishing the species from its congeners.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
South America: middle Rio Araguaia in Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.2 cm SL male/unsexed; (Ref. 93280)
Morphology | Morphometrics
soft rays: 33 - 37. Distinguished from other congeners except Tetragonopterus anostomus by having five principal teeth in the dentary (vs. four) as well as by having relatively smaller teeth of the dentary with pointed cusps (v. robust teeth with somewhat rounded cusps). Differs from T. anostomus by having terminal position of the mouth (vs. subsuperior). Can be diagnosed from T. anostomus and T. araguaiensis by having 13-14/8-9 gill rakers on the upper and lower limbs of the first gill arch (vs.17-20/10-12); from T. argenteus by having 8 predorsal scales (vs. 12-16); from T. carvalhoi by the presence of a rounded dark spot on the caudal peduncle (vs. a lozenge-shaped dark spot on the caudal peduncle); and from T. rarus by the lack of dark longitudinal stripes on the lateral surface of the body (vs. the presence of such stripes) (Ref. 93280).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Silva, G.S.C., B.F. Melo, C. Oliveira and R.C. Benine, 2013. Morphological and molecular evidence for two new species of Tetragonopterus (Characiformes: Characidae) from central Brazil. J. Fish Biol. (Ref. 93280)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02239 (0.00837 - 0.05988), b=2.99 (2.77 - 3.21), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .