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In the 1980s and 90s this species was mixed up and imported alongside Hoplisoma habrosum from Colombia and was mostly thought of as this species. When H. cochui was eventually imported from Brazil it was given the C-number of C022 which untill recently was thought to be H. cochui but since a new paper in 2018 by V.C. Espíndola et al. it was discovered that C022 was a different species altogether and has now been given the new name of Hoplisoma benattii. The difference is in the body markings where H. cochui has 4 blotches and H. habrosus 3. In place of the large blotch in the caudal peduncle of H. habrosum, H. cochui has 2 smaller spots situated between the adipose fin and the caudal peduncle (where the tail meets the body). Weitzman redescribed this species again in 1956. Lineage: Placed in Lineage 6 which has always been classified as Corydoras (Lacépède, 1803) so a new genus would need to be described and a new type species when a new revision is carried out. As of the latest revision (Dias et al 2024) Corydoras cochui has now been placed in Lineage 9 and has the new genus name of Hoplisoma. Aquarium Care: This is akin to most of this genus, very peaceful, and would be best housed with small to medium tank mates such as Tetras, Rasboras and Danios or in a species tank for breeding purposes. Diet: A good quality flake food and tablet food for adults with sporadic feedings of frozen or live food will keep your Corydoras in good health. Etymology: The specific name cochui: In honour of German-born tropical-fish importer Ferdinand (Fred) Cochu, Paramount Aquarium (New York City, USA), who collected the holotype. Remarks: This species is still found on some online sources as Corydoras cochui. Hoplisoma cochui has most recently been assessed for The IUCN Red List of Threatened Species in 2018, and is listed as Least Concern.

Barredtail corydoras

Corydoras cochui

Callichthyidae

South America: Brazil; Upper Araguaia River basin. Type locality: Santa Maria Nova, Rio Araguaya, State of Goiás, Brazil.

Male: 3.0cm. (1¼ins). Female  3.5cm. (1½ins)

23-26°C (73-79°F)

6.0-7.2.

Alexandrou, Markos & Taylor, Martin. (2011). Evolution, ecology and taxonomy of the Corydoradinae revisited.
Angelica C Dias, Luiz F C Tencatt, Fabio F Roxo, Gabriel de Souza da Costa Silva, Sérgio A Santos, Marcelo R Britto, Martin I Taylor, Claudio Oliveira, Phylogenomic analyses in the complex Neotropical subfamily Corydoradinae (Siluriformes: Callichthyidae) with a new classification based on morphological and molecular data, Zoological Journal of the Linnean Society, 2024;, zlae053.
Espíndola, V.C. Tencatt, L.F.C. Pupo, F.M. Villa-Verde, L. & Britto, M.R. 2018. From the inside out: a new species of armoured catfsh Corydoras with the description of poorly-explored character sources (Teleostei, Siluriformes, Callichthyidae).
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Fuller, Ian A.M. & Evers, Hans-Georg: Identifying Corydoradinae Catfish. 2005. 384 p.
Ian A. M. Fuller & Hans-Georg Evers (2011). Identifying Corydoradinae Catfish Supplement 1. Ian Fuller Enterprises.
ScotCat Factsheet no. 31. Jan.1999.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.