Journal Article
Diversity of Brazilian troglobitic fishes: Models of colonization and differentiation in subterranean habitats
Trajano, E.
Record Number:
5280
Year:
2021
Journal:
Diversity
Volume:
13, 106
Notes:
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
Abstract:
Abstract: The Brazilian subterranean ichthyofauna is distinguished worldwide by high taxonomic
and phylogenetic diversity, involving at least 30 exclusively subterranean (troglobitic) lineages. This
may be explained by high native epigean diversty, allied to opportunities for colonization and
genetic isolation in the subterranean biotope, thence originating troglobites. An updated list of
Brazilian troglobitic lineages and a review of previous hypotheses on modes of colonization and
differentiation in subterranean habitats are presented with fresh data and models. Colonization of
and isolation in the subterranean biotope are independent processes, usually separate over time.
Access to subterranean habitats varies from the (sub)horizontal through sinkholes and resurgences of
base-level streams and vadose tributaries to the vertical by shallow and deep phreatic waters through
the hyporheic zone. Phenotypic differentiation of subterranean populations originating troglobites
may be achieved by various, non-mutually exclusive modes of genetic isolation, e.g., directly in
base-level streams and upper tributaries through the extinction of epigean populations, due to
drainage discontinuation in dry paleoclimatic phases (or by other causes), by topographic isolation
due to a lowering of the regional base level and karst catchments or by parapatric differentiation.
Differentiation may also be a consequence of transition from lotic to lentic waters in flooded caves,
and from shallow to deep phreatic habitats.
Keywords: subterranean fishes; evolution; origin of troglobites; Brazil; subterranean biology
Times Cited:
1
Relevent Species:
Related Records:
Gosline, W.A. (1947)
Contibutions to the classification of the loicariid catfishes
Karmann, I. (1994)Evolução e Dinâmica Atual do Sistema Cárstico do Alto Vale do Rio Ribeira de Iguape, Sudeste do Estado de São Paulo
Derijst, E. (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. (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. (2012)Molecular systematics of the armored neotropical catfish subfamily Neoplecostominae (Siluriformes: Loricariidae)
Pereira, H.L. and Reis, R.E. (2017)Morphology-based phylogeny of the suckermouth armored catfishes, with emphasis on the Neoplecostominae (Teleostei: Siluriformes: Loricariidae)
Trajano, E. (2021)Diversity of Brazilian troglobitic fishes: Models of colonization and differentiation in subterranean habitats