Relações filogenéticas das espécies do gênero Rineloricaria Bleeker, 1862 (Siluriformes, Loricariidae, Loricariinae)

Taxonomic revision and phylogenetic relationships of Dasyloricaria Isbrücker & Nijssen, 1979 (Siluriformes: Loricariidae), with description of a new species

“…The outgroup was chosen in order to test both the relationships in Dasyloricaria and among the genera previously included in Rineloricariina sensu Isbrücker. Characters described mainly by Rapp Py-Daniel (1997), Fichberg (2008), and Paixão & Toledo-Piza (2009) for different members of the Loricariinae were included in the analysis with additional characters proposed for the first time herein. The monophyly of Dasyloricaria, the phylogenetic relationships among its species, and the monophyly of the Rineloricariina were tested using the cladistic methodology proposed by Hennig (1966).…”

“…The heuristic search was performed with 1000 replications of Random Addition Sequence and branch swapping through the Tree Bisection Reconnection (TBR) algorithm, with additional TBR swapping to completion, on the unweighted and unordered data matrix. Cladograms were rooted on Harttia loricariformis according to previous phylogenies (Rapp Py-Daniel, 1997;Fichberg, 2008;Paixão & Toledo-Piza, 2009). Tree support was calculated in NONA as decay indices or Bremer support (Bremer, 1994).…”

“…The postorbital notch is a feature found only in some Loricariini among loricariids. We followed Fichberg (2008) and considered the notch as short when it was less than one-half the orbital length (state 1), and long when it is at one-least half the orbital length (state 2; Fig. 9).…”

“…Arrangement of teeth on the lower pharyngeal tooth plate (Fichberg, 2008;Character 107, modified Weberian apparatus and axial skeleton. The Weberian apparatus has been subject of various studies (Alexander, 1965;Chardon, 1968;Grande, 1987) in which its components and their transformations were described and interpreted.…”

Estudos cromossômicos e moleculares em Loricariinae com ênfase em espécies de Rineloricaria (Siluriformes, Loricariidae): uma perspectiva evolutiva

“…Loricariidae é a maior família em número de espécies entre todos os Siluriformes e uma das maiores dentre todas as famílias de peixes do mundo (Nelson, 2006 Os peixes desta família são caracterizados pelo corpo deprimido coberto por placas ósseas e boca ventral em forma de ventosa, sendo, por isso, considerados animais de fundo, hábeis para aderir ao substrato em rios de forte correnteza, raspando o alimento no fundo dos rios. Apresentam ainda um par de barbilhões maxilares, lábios ventrais papilosos e intestino alongado (Nelson, 2006;Covain e Fish-Muller, 2007;Fichberg, 2008). Por ocupar habitats variados, os loricariídeos demonstram um alto valor adaptativo, incluindo a capacidade de se manterem fora da água por um longo período de tempo devido à presença de paredes vascularizadas no estômago (Reis et al, 2003).…”