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Hisonotus armatus Carvalho, Lehmann, Pereira & Reis, 2008

Image contributors to this species:

J. F. Pezzi da Silva (1)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: 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. Body shape, elongated. Habitat: 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. Reproduction: Scatters eggs throughout the aquarium and are not cared for by the parents. Aquarium Care: Said to be a bit more problematic in the aquarium if good water quality is not adhered to. They rest on aquatic vegetation in the aquarium so long leaved plants are recommended. Cooler temperatures and a strong filtration with adequate current will fare better for this species and for this genera overall. Diet: Will feed on flake, algae, tablet foods and algae wafers. Etymology: The specific name armatus: Latin for armed with a weapon, referring to complete covering of odontodes on anterior tip of snout.

Common Name:

Arroyo Pixy Catfish

Synonyms:

None

Family:

Loricariidae

Distribution:

South America: Laguna dos Patos system (Brazil and Uruguay). Type locality: Arambaré stream, on the highway to Pedro Osório, Pedro Osório municipality, Rio Grande do Sul (Carvalho et al. 2008).

Size:

4.5cm. (1¾ins)

Temp:

18-24°c (63-75°f.)

p.H.

6.5-7.2.

IUCN Red List

Hisonotus armatus is widely distributed in the Laguna dos Patos system and the Tramandaí River system in the state of Rio Grande do Sul, Brazil. It is an abundant and frequent species. As there is no measurable evidence of threats to the species, it has been categorised as Least Concern (LC), (IUCN 2022).

Reference:

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.
Chico Mendes Institute for Biodiversity Conservation (ICMBio). 2022. Hisonotus armatus . The IUCN Red List of Threatened Species 2022.
Froese, R. and D. Pauly. Editors. 2025. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 04/2025 ).

Family: Loricariidae Back to Ident-A-Cat Click on Thumbnails

Hisonotus armatus
Live specimen, Rio Piratini, Rio Grande do Sul, Brazil

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