Hisonotus nigricauda (Boulenger, 1891)
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
Hisonotus nigricauda is a species of freshwater ray-finned fish belonging to the family Loricariidae, the suckermouth armored catfishes, and the subfamily Hypoptopomatinae. the cascudinhos. This catfish is found in the drainage basins of the Lagoa dos Patos and the Uruguay River in Argentina, Brazil and Uruguay. In the Lagoa dos Patos Lagoon system, H. nigricauda is found mainly in the lower reaches of the tributaries near to the lagoon, and it is not found in the upper reachess of the Jacuí River basin. In the Uruguay River basin it is commoner in the lower reaches, although it can be found in the upper parts of the Negro River, Quaraí River and Ibicuí River. This species reaches a standard length of 6.0 cm (2.4 in).
Wikipedia contributors, Hisonotus nigricauda; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:48:58.000385+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Hisonotus nigricauda (Boulenger, 1891)
- Name authority
- (Boulenger, 1891)
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Teleostei
- Order
- Siluriformes
- Family
- Loricariidae
- Genus
- Hisonotus
- Extinction status
- Not supplied by this source
Source habitat flags: Marine: no · Freshwater: yes · Terrestrial: no. These do not form a complete habitat description.
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- gigaclassActinopterygii
- superclassActinopteri
- classTeleostei
- orderSiluriformes
- familyLoricariidae Rafinesque, 1815
- subfamilyHypoptopomatinae Eigenmann & Eigenmann, 1890
- genusHisonotus Eigenmann & Eigenmann, 1889
- speciesHisonotus nigricauda (Boulenger, 1891)
Close classified relatives
These entries share the source’s genus, Hisonotus. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber, 2004) | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus carreiro Carvalho & Reis, 2011 | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus charrua Almirón, Azpelicueta, Casciotta & Litz, 2006 | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus depressicauda (Miranda Ribeiro, 1918) | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus depressinotus (Miranda Ribeiro, 1918) | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus francirochai (Ihering, 1928) | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus hungy Azpelicueta, Almirón, Casciotta & Koerber, 2007 | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus iota Carvalho & Reis, 2009 | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus leucofrenatus (Miranda Ribeiro, 1908) | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus maculipinnis (Regan, 1912) | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus notatus Eigenmann & Eigenmann, 1889 | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
| Hisonotus notopagos Carvalho & Reis, 2011 | LoricariidaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Otocinclus nigricauda Boulenger, 1891 Boulenger, 1891 | synonym |
| Microlepidogaster nigricauda (Boulenger, 1891) (Boulenger, 1891) | synonym |
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://www.marinespecies.org/aphia.php?p=taxdetails&id=1019597 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:3M4VX. Classification follows source parent identifiers. English common names may vary by region.