Trichomycterus trefauti
| Trichomycterus trefauti | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Trichomycteridae |
| Genus: | Trichomycterus |
| Species: | T. trefauti
|
| Binomial name | |
| Trichomycterus trefauti | |
Trichomycterus trefauti is a species of freshwater ray-finned fish belonging to the family Trichomycteridae, the pencil and parasitic catfishes.[2] This catfish is presently only known from the upper basin of the São Francisco River in Minas Gerais state, Brazil.
This is a small, cylindrical catfish (35–55 mm standard length) which can most readily be distinguished from its congeners by its uniformly grey colouring, marked only by a distinctive elliptical dark spot at the base of the caudal fin. Other notable features include widely spaced eyes, very long barbels, the extension of the first ray of the pectoral fin into a long filament and pelvic fins which completely cover the anus and urogenital openings.
References
- Wosiacki, W. B. (2004). "New species of the catfish genus Trichomycterus (Siluriformes, Trichomycteridae) from the headwaters of the rio São Francisco basin, Brazil" (PDF). Zootaxa. 592: 1–12. doi:10.11646/zootaxa.592.1.1.
- Froese, Rainer; Pauly, Daniel (eds.). "Trichomycterus trefauti". FishBase. February 2012 version.
- ^ Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio) (2022). "Trichomycterus trefauti". IUCN Red List of Threatened Species (in Brazilian Portuguese). 2022 e.T186651A1816322. doi:10.2305/IUCN.UK.2022-1.RLTS.T186651A1816322.pt. Retrieved 25 November 2025.
- ^ a b Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Species in the genus Trichomycterus". Catalog of Fishes. California Academy of Sciences. Retrieved 24 November 2025.