Isbrueckerichthys alipionis

(Gosline 1947) Derijst 1996



This is an isolated cave population of an otherwise epigean species. It was originally (Trajano et al. 2008) considered as a troglophilic popualtion, capable of living permanently in either epigean or hypogean environments. More recently Trajano (2021) has shown that the cave population is completey isolated from other populations of I. alipionis and is therefore effectively troglobitic, though it has not yet has sufficient time to evolve any troglomorphic features. Isolation is due to evolution of the karst basin in which the fish is found such that the streamway is now not connected to to other stream segments due to downcutting.  


Pareiorhaphis alipionis  Gosline 1947




This population is not yet recognised as a separate taxon, though it probably should be, and there are currently no types.


Known only from the "type locality": Santana Cave, Alto Ribeira karst area, Iporanga, Sao Paulo State, Brazil.


An upper level vadose tributary which is isolated by vertical waterfalls from downstream passages.


Should probably be considered as a taxon separate from epigean I. alipionis. In the subfamily Neoplecostominae.

Conservation Status


Museum Holdings

None known.

Internet Resources

Fishbase account

Key References

Gosline, W.A. Journal Article 1947 Contibutions to the classification of the loicariid catfishes
Karmann, I. Thesis 1994 Evolução e Dinâmica Atual do Sistema Cárstico do Alto Vale do Rio Ribeira de Iguape, Sudeste do Estado de São Paulo
Derijst, E. Journal Article 1996 Notes on the type species of the mailed catfish genus Pareiorhaphis Miranda-Ribeiro 1918 (Pisces: Siluriformes: Loricariidae), with the introduction of Isbrueckichthys nom. nov.
Trajano, E., Secutti, S., Pereira, E.H.L. and Reis, R. E. Journal Article 2008 A cave population of Isbrueckerichthys alipionis (Gosline, 1947) in the Upper Ribeira karst area, southeastern Brazil (Siluriformes: Loricariidae)
Roxo, F.F., Zawadzki, C.H., Guilherme, J., Silva, D.C., Chiachio, M.C., Foresti, F., and Oliveira, C. Journal Article 2012 Molecular systematics of the armored neotropical catfish subfamily Neoplecostominae (Siluriformes: Loricariidae)
Pereira, H.L. and Reis, R.E. Journal Article 2017 Morphology-based phylogeny of the suckermouth armored catfishes, with emphasis on the Neoplecostominae (Teleostei: Siluriformes: Loricariidae)
Trajano, E. Journal Article 2021 Diversity of Brazilian troglobitic fishes: Models of colonization and differentiation in subterranean habitats