Corydoras narcissus

Corydoras narcissus, commonly known as the long nosed arched cory, is a freshwater fish belonging to the Corydoradinae subfamily of the family Callichthyidae, native to the Madeira and Purus river basins in Amazonian Brazil.[1][2] It has a longer, more concave ("saddle-shaped") nose, but its color pattern resembles that also seen in a few other Corydoras species (for example, C. arcuatus, C. bethanae, C. granti and C. urucu) from the western Amazon basin, as well as Brachyrhamdia thayeria; they all have spiny fins with a (to humans) painful but not dangerous venom and their similarity is an example of Müllerian mimicry.[3][4][5][6] C. narcissus generally is an uncommon species in its range.[1]

Corydoras narcissus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Callichthyidae
Genus: Corydoras
Species:
C. narcissus
Binomial name
Corydoras narcissus

C. narcissus is large for a Corydoras and may reach up to 6.5 cm (2.6 in) in standard length.[3] It feeds on worms, small crustaceans, insects, and plant matter. It lays eggs in dense vegetation, and adults do not guard the eggs. Unlike most Corydoras species but similar to the other "saddlenoses", C. narcissus tend to occur in small groups (not larger groups) and especially during the breeding period mature males are quite aggressive towards each other.[3][7]

The species was first collected by Herbert R. Axelrod and Martin R. Brittan. It was first described and named narcissus by Han Nijssen and Isaäc J. H. Isbrücker to recognize the collectors "for their many naming suggestions".[8]

See also

References
  1. Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio) (2022). "Corydoras narcissus". IUCN Red List of Threatened Species. 2022: e.T134702489A134702497. doi:10.2305/IUCN.UK.2022-1.RLTS.T134702489A134702497.pt. Retrieved 23 September 2023.
  2. Froese, Rainer; Pauly, Daniel (eds.) (2023). "Corydoras narcissus" in FishBase. September 2023 version.
  3. "PlanetCatfish.com - Corydoras narcissus • Callichthyidae • Cat-eLog". www.planetcatfish.com. Retrieved 2016-01-12.
  4. Tencatt, L.F.C.; Lima, F.C.T.; Britto, M.R. (2019). "Deconstructing an octogenarian misconception reveals the true Corydoras arcuatus Elwin 1938 (Siluriformes: Callichthyidae) and a new Corydoras species from the Amazon basin". J. of Fish Biology. 95 (2): 453–471. doi:10.1111/jfb.13980.
  5. Slobodian, V.; Bockmann, F.A. (2013). "A new Brachyrhamdia (Siluriformes: Heptapteridae) from Rio Japurá basin, Brazil, with comments on its phylogenetic affinities, biogeography and mimicry in the genus". Zootaxa. 3717 (1): 001–022. doi:10.11646/zootaxa.3717.1.1.
  6. Alexandrou, M.A.; et al. (2011). "Competition and phylogeny determine community structure in Müllerian co-mimics". Nature. 469: 84–88. doi:10.1038/nature09660.
  7. "Corydoras narcissus and Corydoras bethanea (= C. sp. "Narcissus II"; CW6)". AquariumGlaser. 29 July 2022. Retrieved 23 September 2023.
  8. Isbrücker, I.J.H.; Nijssen, H. (1980). "Three New Corydoras Species From French Guiana and Brazil (Pisces, Siluriformes, Callichthyidae)". Netherlands Journal of Zoology. 30 (3): 494–503. doi:10.1163/002829680X00113.
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