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Oliver Lucanus (2) Mark Goh (1) Allan James (1) CP Aqua Studio (2) Steven Grant (2) G.M Aquatics (1) Zierfisch Zentrum Austria (2) Ingo Seidel (2)

Due to the revision and descriptions by Dias et al 2024 to the Corydoradinae sub family of Callichthyidae, CW004 and CW155 have turned out to be one and the same species and have been placed in Lineage 9, the "short-snouted" species with the designated type species: C. punctatus. The revision and description has constituted in the resurrection of the genus name Hoplisoma (Agassiz, 1846). Due to the new paper in 2025 by Tencatt et al, the CW numbers of CW004 (lineage 9), CW155 (lineage 8) , CW156 (lineage 1) and CW167 (lineage 8) have now been described as Hoplisoma noxium. 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/Hoplisoma in good health. Etymology: The specific epithet “noxium” derives from the Latin “noxa”, a noun meaning “injury, damage”, plus “ium”, a Latin suffix used to form adjectives from nouns. The name alludes to the powerful toxin released by the new species under stress, which kills any fish kept in the same bag/container during transport. An adjective. Remarks: This species is still found on some online sources as Hoplisoma sp. (CW004, CW155, CW156, & CW167).

CW004, CW155, CW156, CW167, Corydoras sp "Ancestor", Corydoras sp "Ancestor"11, Corydoras sp "Ancestor" 111.

None

Callichthyidae

South America: Mato Grosso, upper Rio Tapajos drainage, Cachimbo region, near the Rio Jamanxim, between the Rio Xingu and Rio Tapajos drainages.

Male: 6.0 cm (2¼ins) Female: 6.0cm (2½ins)

22-26°C (71-79°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.
Ian A. M. Fuller & Hans-Georg Evers (2024). Identifying Corydoradinae Catfish Second Edition. Ian Fuller Enterprises.
Luiz Tencatt, Willian Massaharu Ohara, Vandergleison de Carvalho, Steven Grant, Marcelo Ribeiro de Britto. Two exquisite new species of Hoplisoma (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with a discussion on the morphology of the mesethmoid within Corydoradinae, Neotropical Ichthyology, 23(1).
www.corydorasworld.com