Trichomycterus undescribed species 3

[Castellanos-Morales and Galvis 2012]



Note:  This species is currently in the process of being described by Donascimiento and Prada-Pedreros.






This species has not been described so there are no types.


Known only from one locality: Sistema Caribe, Department of La Guajira, Colombia.


No published details.


No published details.

Biological Notes

Florez et al. (2020) made a very thorough study of both epigean and hypogean Trichomycterus in the Province of Santander, Colombia. They were keen to understand whether the hypogean populations were derived from a single colonisation, evolution of troglomorphy and then dispersal to the known cave sites, or whether there had been multiple parallel colonisations followed by independent evolution of troglomorphy. Their data were quite clear that it was the second of these possibilities that had occurred and that some cave populations are very closely related to epigean ones.

Figure 2 of Florez et al. (2020) shows the relationships of all sampled Trichomycterus, and some other, taxa. The best supported clades are numbered 1-3 and hypogean Trichomycterus are found only in clades 1 and 2. Unnumbered clades received lower support and are not relevant here as they contain no troglomorphic taxa. Clade 1 consists of only the troglomorphic T. rosablanca and the widespread epigean species Eremophilus mutisii. Clade 2 is bigger and considerably more complex with 27 terminal taxa in four groups. Group 1 is monophyletic and consists of only the troglomorphic Trichomycterus undescribed species Guapota (3 terminals). Group 2 consists of two taxa, the non-troglomorphic Trichomycterus undescribed species Guadalupe (5 terminals) and the non-troglomorphic T. latistriatus (1 terminal). Group 3 is monophyletic and complex with 18 terminals. Three taxa are found in this group: T. sandavali (4 terminals), Trichomycterus undescribed species Zapatoca (7 terminals) and the hypogean, though apparently not troglomorphic T. uisae (7 terminals). Group 4 is monophyletic and consist of only the non-troglomorphic Trichomycterus undescribed species Curiti (3 terminals). From this set of data we can see that there are at least an additional two troglomorphic species in the genus that are not yet described, Guapota and Zapatoca. This takes the number of troglobitic species in the country to 12 with 5 currently undescribed. However, the lack of genetic structure in Group 3 strongly suggests that all terminals are very closely related and could be considered as the same species. If this were to be accepted then the formal name would be Trichomycterus sandovali Ardila Rodriguez 2006 and Zapoatoca need not be described.

Conservation Status


Museum Holdings

None known.

Key References

Castellanos-Morales, C.A., Marino-Zamudio, L.L., Guerrero, L. and Maldonado-Ocampo, J. Journal Article 2011 Peces del departamento de Santander, Colombia
Castellanos-Morales, C.A. and Galvis, F. Journal Article 2012 Las especies del genero Trichomycterus (Siluriformes: Trichomycteridae) en Colombia
DoNascimiento C., Herrera-Collazos E.E., Herrera-R G.A., Ortega-Lara A., Villa-Navarro F.A., Usma-Oviedo J.S. and Maldonado-Ocampo J.A. Journal Article 2017 Checklist of the freshwater fishes of Colombia: a Darwin Core alternative to the updating problem
Flórez, J.S., Cadena, C.D., DoNascimiento, C. and Torres, M. Journal Article 2020 Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale
Flórez, J.S., Cadena, C.D., Donascimiento, C. and Torres, M. Journal Article 2021 Repeated colonization of caves leads to phenotypic convergence in catfishes (Siluriformes: Trichomycterus) at a small geographical scale