(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 and 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 sements 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.
|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|
|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|