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Allan James (2) Chris Ralph (4) Haakon Haagensen (1) Joakim Schön (1) Ivor Hilton (1) Steven Milne (2)

Formerely CW006 but has now been described by Rebecca Bentley, Steven Grant and Dr. Luiz Tencatt and named after Steven Grant's daughter Bethan. This species is often found with the so-called Corydoras sp. "Super arcuatus" (CW036) which is now Brochis arcuatus and is similar looking to Corydoras narcissus but has a shorter and squatter body. There is also another similar form from Brazil. Original Description: A new Corydoras is described from the Blanco and Ucayali river basins in Peru. The new species can be distinguished from its congeners by having the following features: (I) posterior margin of dorsal-fin spine with laminar serrations directed towards the origin of the spine; (II) a long, wide, arched, and continuous black stripe, which runs parallel to the dorsal profile of the body, extending at least from the region below anterior origin of dorsal fin to the anterior half of the ventral caudal-fin lobe; (III) a black stripe transversally crossing the eye, forming the typical mask-like blotch; mask clearly not fused to arched stripe in most specimens; some specimens with mask separated from arched stripe by a thin line around the suture between neurocranium (in the region composed by the posteroventral margin of parieto-supraoccipital plus the posterodorsal margin of the compound pterotic) and first dorsolateral body plate; (IV) posterior margin of pectoral-fin spine with laminar serrations directed towards the origin of the spine; (V) pointed snout, presenting a long mesethmoid, with anterior tip larger than 50% of the entire length of the bone; and (V) ventral surface of trunk covered by small, non-coalescent platelets. Lineage: Placed in Lineage 8 sub clade 4 which comprises the "intermediate long-snouts" with deeper bodies. It also includes Brochis in sub-clade 1 which was synonymised with Corydoras by Britto in 2003 but in time there will be a revision which will resurrect Brochis (Cope, 1871) to full genera again. As of the latest revision (Dias et al 2024) Corydoras bethanae has now been placed in Lineage 8 sub clade 4 and has the new genus name of Brochis. 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/Brochis in good health. Remarks: Still found on some online sources as Corydoras bethanae.

Narcisso Cory, CW006, Corydoras sp. cf. narcissus

Corydoras bethanae

Callichthyidae

South America: Blanco and Ucayali river basins, Peru.

Male: 6.5cm (2½ins) Female: 7.0cm (2¾ins)

23-25°C (73-77°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.
Bentley, Rebecca Frances, Grant, Steven, Tencatt, Luiz Fernando Caserta. A new arc-striped species of Corydoras Lacépède, 1803 (Teleostei: Callichthyidae) from the Peruvian Amazon. Zootaxa, [S.l.], v. 4948, n. 2, p. 184–200, mar. 2021. ISSN 1175-5334.
Ian A. M. Fuller & Hans-Georg Evers (2011). Identifying Corydoradinae Catfish Supplement 1. Ian Fuller Enterprises.
www.corydorasworld.com