Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber, 2004)
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 aky, sometimes known as the green hisonotus, is a species of freshwater ray-finned fish belonging to the family Loricariidae, the suckermouth armoured catfishes, and the subfamily Hypoptopomatinae, the cascudinhos. This catfish occurs in the Uruguay River basin in Misiones Province, Argentina, and the states of Santa Catarina and Rio Grande do Sul in Brazil. This species reaches a standard length of 4 cm (1.6 in). H.aky was first formally described as Epactionotus aky in 2004 by María de las Mercedes Azpelicueta, Jorge Rafael Casciotta, Adriana Edith Almirón and Stefan Koerber with its type locality given as the Arroyo Garibaldi at 26°38'46.1"S, 53°59'55"W in the Uruguay River basin in Misiones, Argentina. In 2009 the species was reclassified in the genus Hisonotus.
Wikipedia contributors, Hisonotus aky; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T22:48:49.803186+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber, 2004)
- Name authority
- (Azpelicueta, Casciotta, Almirón & Koerber, 2004)
- 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 aky (Azpelicueta, Casciotta, Almirón & Koerber, 2004)
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 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 nigricauda (Boulenger, 1891) | 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 |
|---|---|
| Epactionotus aky Azpelicueta, Casciotta, Almirón & Koerber, 2004 Azpelicueta, Casciotta, Almirón & Koerber, 2004 | 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=1009529 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:3M4V6. Classification follows source parent identifiers. English common names may vary by region.