Osteogaster eques

Osteogaster eques
Conservation status
Least Concern  (IUCN 3.1) [1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Callichthyidae
Genus:	Osteogaster
Species:	O. eques
Binomial name
Osteogaster eques Steindachner, 1876
Synonyms
Corydoras equesSteindachner, 1876 Corydoras equesSteindachner, 1877

Osteogaster eques, the horseman's cory catfish or true eques cory, ^{[2] [3]} is a tropical freshwater fish belonging to the subfamily Corydoradinae of the family Callichthyidae. It was first described by Austrian zoologist Franz Steindachner. ^[4] It is native to the Brazilian Amazon basin. ^[5] The name eques means Knight, horseman or rider in Latin. ^[6]

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. ^[7]

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. "Horseman's Cory Catfish (Corydoras eques)". aquaticarts.com. Retrieved 2022-11-29.
3. "True Eques Cory (Corydoras eques)". Aqua Imports. Retrieved 2022-11-29.
4. "ScotCat Factsheets: October 2013: Osteogaster eques Steindachner, 1877". www.scotcat.com. Archived from the original on 17 July 2025. Retrieved 20 September 2025.
5. "Corydoras eques | Cory Database". corydoras.zone. 2022-04-07. Archived from the original on 2022-11-29. Retrieved 2022-11-29.
6. "Corydoras eques". aquainfo.org. Archived from the original on 2022-12-01. Retrieved 2022-12-01.
7. Baensch, R. A. and R. Riehl (1991). Aquarien Atlas (in German). Vol. Band. 1.^{[ page needed ]}.