Gymnocorymbus thayeri

Gymnocorymbus thayeri
Conservation status
Least Concern  (IUCN 3.1) [1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Acestrorhamphidae
Genus:	Gymnocorymbus
Species:	G. thayeri
Binomial name
Gymnocorymbus thayeri C. H. Eigenmann, 1908 [2]

Gymnocorymbus thayeri, the false black tetra, silver tetra, silver widow tetra or pataca, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This species is found in South America.

References

1. Lima, F. (2023). "Gymnocorymbus thayeri". IUCN Red List of Threatened Species . 2023 e.T49830452A177028570. doi: 10.2305/IUCN.UK.2023-1.RLTS.T49830452A177028570.en . Retrieved 24 October 2025.
2. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Gymnocorymbus". Catalog of Fishes . California Academy of Sciences . Retrieved 24 October 2025.