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C. H. Bishop (4) Allan James (2) Sandy Milne (1) Craig (1) Johnny Jensen's Photographic Library (1) Lee Meadows (2)

The first 4 specimen thumbnails were caught in north Argentina in the Corrientes province at Posados City near the border with Paraguay in the south west zone of the province by the collectors, Carlos and Noemi Bishop in 2003. Similar species are Hoplisoma albolineatum from the Rio Guapore and another undescribed species from the Bolivian Pantanal. Lineage: Placed in Lineage 9, the "short-snouted" species with the designated type species: C. punctatus. A revision in the future would constitute the resurrection of the genus name Hoplisoma (Agassiz, 1846). As of the latest revision (Dias et al 2024) Corydoras polystictus has now been placed in Lineage 9 and has the new genus name of Hoplisoma and a change to the specific name to polystictum. 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 name polystictum: From the Greek poly = 'many' and stiktum  = 'spotted', alluding to the small spots on this species. Remarks: This species is still found on some online sources as Corydoras polystictus.

None

Corydoras viriscens, Corydoras polystictus

Callichthyidae

South America: Argentina, Northern in Corrientes province near Posados City. Brazil; Mato Grosso, Descalvados.

Male: 4.5cm (1¾ins) Female: 5.0cm (2ins)

23-27°C (73-81°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 (2011). Identifying Corydoradinae Catfish Supplement 1. Ian Fuller Enterprises.