Article · Wikipedia archive · Last revised Jul 5, 2026

Osteogaster eques

Osteogaster eques, the horseman's cory catfish or true eques cory, is a tropical freshwater fish belonging to the subfamily Corydoradinae of the family Callichthyidae. It was first described by Austrian zoologist Franz Steindachner. It is native to the Brazilian Amazon basin. The name eques means "knight", "horseman" or "rider" in Latin.

Last revised
Jul 5, 2026
Read time
≈ 1 min
Length
257 w
Citations
9
Source
Wikipedia ↗
Osteogaster eques
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Callichthyidae
Genus: Osteogaster
Species:
O. eques
Binomial name
Osteogaster eques
Synonyms2
  • Corydoras eques Steindachner, 1876

Osteogaster eques, the horseman's cory catfish or true eques cory,34 is a tropical freshwater fish belonging to the subfamily Corydoradinae of the family Callichthyidae. It was first described by Austrian zoologist Franz Steindachner.5 It is native to the Brazilian Amazon basin.6 The name eques means "knight", "horseman" or "rider" in Latin.7

Life cycle

The male fertilizes the female's 2–4 eggs between her pelvic fins for around 30 seconds. Only then does the female swim to a suitable location and attach the very adhesive eggs. The couple continues doing this until around 100 eggs have been fertilized and connected.8

References

References

  1. Frederico, R.G. (2023). "Corydoras eques". IUCN Red List of Threatened Species. 2023 e.T49829981A159296257. doi:10.2305/IUCN.UK.2023-1.RLTS.T49829981A159296257.en. Retrieved 20 September 2025.
  2. Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Species in the genus Osteogaster". Catalog of Fishes. California Academy of Sciences. Retrieved 12 December 2025.
  3. "Horseman's Cory Catfish (Corydoras eques)". aquaticarts.com. Retrieved 2022-11-29.
  4. "True Eques Cory (Corydoras eques)". Aqua Imports. Retrieved 2022-11-29.
  5. "ScotCat Factsheets: October 2013: Osteogaster eques Steindachner, 1877". www.scotcat.com. Archived from the original on 17 July 2025. Retrieved 20 September 2025.
  6. "Corydoras eques | Cory Database". corydoras.zone. 2022-04-07. Archived from the original on 2022-11-29. Retrieved 2022-11-29.
  7. "Corydoras eques". aquainfo.org. Archived from the original on 2022-12-01. Retrieved 2022-12-01.
  8. Baensch, R. A. and R. Riehl (1991). Aquarien Atlas (in German). Vol. Band. 1..