Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Loricariidae
(Armored catfishes) > Hypoptopomatinae
Etymology: Hisonotus: Greek, isos = equal + Greek, noton = back (Ref. 45335); armatus: The specific name is derived from the Latin 'arm' (weapon) and 'atus' (armed), in reference to the complete covering of odontodes on the anterior tip of the snout. More on authors: Carvalho, Lehmann, A., Pereira & Reis.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Subtropical
South America: Laguna dos Patos system in Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.0 cm TL male/unsexed; (Ref. 111122)
Morphology | Morphometrics
Distinguished from all other species of Hisonotus, except Hisonotus notatus and Hisonotus leucofrenatus, by having anterior margin of the snout completely covered by
odontodes vs. with a narrow or wide odontode-free; large plates in the abdominal median series, usually comprising one series of plates between the lateral abdominal plates vs. abdominal median series of plates small, with several plate series irregularly arranged
between the lateral abdominal ones. Can be differentiated from Hisonotus notatus and Hisonotus leucofrenatus in the presence on the caudal fin of a series of light hyaline spots, forming a vertical light bar, vs. a rounded hyaline blotch or no hyaline area in the midventral portion of caudal fin (Ref. 78747).
Occurs in slow to moderate flowing watercourses, with clear to brown water over sandy bottom and in marginal or submerged aquatic vegetation. Sympatric with Hisonotus laevior throughout its distribution (Ref. 78747).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Carvalho, T.P., P. Lehmann A., E.H.L. Pereira and R.E. Reis, 2008. A new species of Hisonotus (Siluriformes: Loricariidae: Hypoptopomatinae) from the Laguna dos Patos Basin, Southern Brazil. Copeia 2008(3):510-516. (Ref. 78747)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00525 (0.00255 - 0.01080), b=3.09 (2.91 - 3.27), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic Level (Ref. 69278
): 2.0 ±0.1 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .