Hisonotus laevior
Cope, 1894
Synonyms
Cascudinho-pardo
Hisonotus leptochilus
Microlepidogaster laevior
Microlepidogaster leptochilus
Otocinclus laevior
Otocinclus leptochilus
Hisonotus leptochilus
Microlepidogaster laevior
Microlepidogaster leptochilus
Otocinclus laevior
Otocinclus leptochilus
least concern
Length (total)
approx. 7 cm
Standard length (documented)
47.2 mm
Recommended tank size
60 cm
Temperature
15 - 22 °C
rio Jacuí, arroio Dom Marcos, arroio Feitoria, arroio Francisquinho, arroio Gil, arroio Passo dos Ferreiros, rio São Sepé, lagoa dos Patos = laguna dos Patos, arroio do Banhado, arroio Boici, unnamed creek to rio Camaquã, arroio Duro, unnamed creek to arroio Hilário, unnamed creek to arroio dos Ladrões, arroio Maria Ulghim, lagoa Negra, arroio Sanga das Capivaras, arroio Santa Isabel, arroio Teixeira, arroio do Tigre, arroio Velhaco, unnamed creek to arroio Arambaré, arroio Mata Olho, canal Novo Arroio Taim, rio Piratini, rio Piratinizinho, arroio Reduzindo = arroio Reduzino, rio Guaíba -, rio Pardo -, rio dos Sinos -, rio Caí basin
Rio Grande do Sul, Canelones, San José
Brazil, Uruguay
rio Vacacaí | rio Gravataí | rio Taquari | rio Cadeia → rio Caí ⇒ rio Jacuí ⇒ rio Guaíba | (arroio Duro | arroio Bebedouro Grande) → rio Camaquã | arroio Velhaco | (arroio Arambaré → arroio Basílo → rio Piratini | laguna Merín) ⇒ canal São Gonçalo ⇒ lagoa dos Patos → Atlantic SE
˜[ -29.954,-51.767 ]
Type of water
Clear water, Black water
Substrate
sand
Nutrition (mostly): vegetarian
Eats plants
not known
Keeping in groups is necessary.
unknown
absent
I / 5 rays
14 soft rays
slightly incised / concave
fin edges: white
II / 7 rays
6 soft rays
5 soft rays
I / 5 rays
14 soft rays
slightly incised / concave
fin edges: white
II / 7 rays
6 soft rays
5 soft rays
Not on the positive list of Brazil in 2012 : The positive list of Brazil
Not on the negative list of Brazil from 2020 : The negative list of Brazil
Not on the negative list of Brazil from 2020 : The negative list of Brazil
- Reis, R.E., Kullander, S.O. & Ferraris, C.J. et.al., 2003 "Check List of the Freshwater Fishes of South and Central America" P. 322
- H.-G. Evers / I. Seidel "Welsatlas 1" edition: 2 P.366
- Cope, E.D., 1894 "On the Fishes obtained by the Naturalist Expedition in rio Grande do Sul" (Proceedings of the American Philosophical Society Held At Philadelphia fro Promoting useful Knowledge, Vol. 33, P. 95)
- Carvalho, T.P. & Reis, R.E., 2011 "Taxonomic review of Hisonotus Eigenmann & Eigenmann (Siluriformes: Loricariidae: Hypoptopomatinae) from the laguna dos Patos system, southern Brazil" (Neotropical Ichthyology, Vol. 9 No. 1)
- Cope, E.D., 1894 "On the Fishes obtained by the Naturalist Expedition in rio Grande do Sul" (Proceedings of the American Philosophical Society Held At Philadelphia fro Promoting useful Knowledge, Vol. 33, P. 96)
- Isbrücker, I.J.H., 1980 "Classification and catalogue of the mailed Loricariidae (Pisces, Siluriformes)" (Verslagen en technische Gegevens. Instituut voor Taxonomische Zoölogie, No. 22, P. 83)
- Malabarba, L.R., 1989 "Histórico sistemático e lista comentada das espécies de peixes de ägua doce do sistema da Laguna dos Patos, Rio Grande do Sul, Brasil" (Comunicações do Museu de Ciências da PUCRS, Vol. 2 No. 8, P. 149)
- Aquino, A.E.; Schaefer, S.A. & Miquelarena A.M., 2001 "A New Species of Hisonotus (Siluriformes, Loricariidae) of the Upper Río Uruguay Basin" (American Museum Novitates, No 3333, P. 9)
- Almirón, A.; Azpelicueta, M. de las M.; Casciotta, J.R. & Litz, T., 2006 "A new species of Hisonotus (Siluriformes, Loricariidae, Otothyrini) from the República Oriental del Uruguay" (Revue suisse de zoologie, Vol. 113, P. 93)
- Casciotta, J.; Azpelicueta, M.; Almirón, A. & Litz T.O., 2006 "Hisonotus candombe, a new species from the río Uruguay basin in the República Oriental del Uruguay (Siluriformes, Loricariidae, Otothyrini)" (Spixiana, Vol. 29 No. 2, P. 150)
- Ferraris, C.J. jr., 2007 "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types (I)" (Zootaxa, Vol. 1418, P. 248)
- Britskie, H.A. & Garavello, J.C., 2007 "Description of two new sympatric species of the genus Hisonotus Eigenmann and Eigenmann, 1889, from upper Rio Tapajós, Mato Grosso state, Brazil (Pisces: Ostariophysi: Loricariidae)" (Brazilian Journal of Biology, Vol. 67 No. 3, P. 414)
- Carvalho, T.P.; Lehmann, P.A.; Pereira, E.H.L. & Reis, R.E., 2008 "A New Species of Hisonotus (Siluriformes: Loricariidae: Hypoptopomatinae) from the Laguna dos Patos Basin, Southern Brazil" (Copeia, Vol. 2008 No. 3, P. 515)
- Corrêa, F.; de Oliveira, E.F.; Tuchtenhagen, T.; Pouey, J. & Piedras, S., 2015 "Ichthyofauna of the hydrographic basin of the Chasqueiro Stream (Mirim Lagoon system, southern Brazil): generating subsidies for conservation and management" (Biozs Nroztopica, Vol. 15 No. 4)
- Ferrer, J.; Azevedo, M.A.; Giora, J.; Cavalheiro, L.W.; Wingert, J.M.; Aguiar, A.; Vargas, N.D.; Santos, J.P.M. dos; Vanin, A.S.; Fialho, C.B.; Harts, S. & Malabarba, L.R., 2015 "Refúgio de Vida Silvestre Banhado dos Pachecos: um verdadeiro abrigo para a ictiofauna relictual de mata paludosa na região metropolitana de Porto Alegre, RS, Brasil" (Boletim Sociedade Brasileira de Ictiologia, No. 114, P. 12)
- Roxo, F.F.; da Costa e Silva, G. & Oliveira, c., 2015 "A new species of Hisonotus (Siluriformes, Loricariidae) from rio São Francisco basin, Brazil" (ZooKeys, No. 498, P. 138)
- Zawadzki, C.H.; Roxo, F.F. & Graça. W.J. da, 2016 "Hisonotus pachysarkos, a new species of cascudinho from the rio Ivaí basin, upper rio Paraná system, Brazil (Loricariidae: Otothyrinae)" (Ichthyological Exploration of Freshwaters, Vol. 26 No. 4, P. 380)
- Roxo, F.F.; Silva, G.S.C.; Waltz, B.T. & Melo, J.E.G., 2016 "A new species of Hisonotus (Siluriformes: Otothyrinae) from the upper rio Paraná and rio São Francisco basins, Brazil" (Zootaxa , Vol. 4109 No. 2, P. 236)
- Bertaco, V.A.; Ferrer, J.; Carvalho, F.R. & Malabarba, L.R., 2016 "Article Inventory of the freshwater fishes from a densely collected area in South America —a case study of the current knowledge of Neotropical fish diversity" (Zootaxa, Vol. 4138 No. 3, P. 418)
- Calegari, B.B.; Morlis, W.G. & Reis, R.E., 2017 "A new species of Otothyropsis (Siluriformes: Loricariidae) from the upper Río Paraná basin, Paraguay, with a discussion of the limits between Otothyropsis and Hisonotus" (Zootaxa, Vol. 4244, No. 2, P. 243)
- Roxo, F.F.; Silva, G.S.C. & Melo, B.F., 2018 "Hisonotus devidei, a new species from the São Francisco basin, Brazil (Siluriformes: Loricariidae) " (Journal of Fish Biology)
- Londoño-Burbano, A. & Reis, R.E., 2021 "A combined molecular and morphological phylogeny of the Loricariinae (Siluriformes: Loricariidae), with emphasis on the Harttiini and Farlowellini" (PlosOne)
- Malabarba, L.R.;Hirschmann,A.; Lucena,C.A.S. de; Giora,J.; Wingert,J.M.; Ferrer,J.; Silva,P.C ; Angrizani,R.C.; Costa Ramos,R. da; Kullander,S.; Carvalho,T.P.; Bertaco,V.; Fialho,C.B. & Bonato,K.O., 2025 "Guia Peixes do Bioma Pampa"
Many thanks to
for the pictures
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Link: https://www.suedamerikafans.de/en/wels-datenbank/welsart/?art=1228
1228
15.10.2025