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Variable markings in this species. H julii is often sold as H. trilineatus but H. julii has a fine spotted head and H. trilineatus has what you would term, reticulations in that area and is also a heavier looking fish. Another Cory that is similar is Brochis leopardus, but this species has a longer head (lineage 8 sub clade 4). 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 trilineatus has now been placed in Lineage 9 and has the new genus name of Hoplisoma and a change to the specific name to trilineatum. Aquarium Care: This is akin to most of this genus, very peaceful, and would be best housed with small to medium sized tankmates such as Tetras, Rasboras and Danios or in a species tank for breeding purposes. Best to purchase 6 individuals or more as they will be happier in a group. Diet: Feeding is not a problem as they will readily consume commercial foods such as flake, granular and tablet foods and frozen foods such as bloodworms and daphnia, like all fish they benefit from regular feedings of live foods such as Daphnia, Cyclops, Grindal worms and bloodworms. Etymology: The specific name trilineatum: tri– (L.), three; lineatum (L.), lined, referring to three stripes (two white, one black) along middle of body. Remarks: This species is still found on some online sources as Corydoras trilineatus.

Three-lined Corydoras

Corydoras episcopi, Corydoras dubius, Corydoras trilineatus

Callichthyidae

South America: Peru, in the tributaries of the Rio Ambyiacu. Ecuador, tributaries of the Rio Napo and the Rio Pastaza.

Male: 5.0cm (2ins) Female: 5.5cm (2¼ins)

24-27°C (75-81°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.
ScotCat Factsheet no. 64. October 2001