Ituglanis payaya (Sarmento-Soares, Zanata & Martins-Pinheiro, 2011)

Costa, Wilson J. E. M., Mattos, José Leonardo O. & Katz, Axel M., 2021, Saphonecrus globosus Schweger and Tang 2015, Zoological Studies (Zool. Stud.) 60 (43), pp. 1-12 : 9

The clade Ituglanis payaya plus Ituglanis paraguassuensis

Ituglanis is a geographically widespread genus, occurring in most cis-Andean lowland river basins of South America ( Fig. 3 ). Although a phylogenetic analysis among species of Ituglanis was not within the scope of this paper, the present analysis including nine species representing different lineages of the genus highly supported I. payaya as sister to I. paraguassuensis . Both I. payaya and I. paraguassuensis are endemic to the same region: rivers draining into the Chapada Diamantina ( Fig. 3 ), being the only species of the genus occurring in the Caatinga, a semiarid region comprising the seasonally dry forests of north-eastern Brazil. The Chapada Diamantina has is considered to be an important biodiversity centre, with numerous endemic taxa ( Juncá et al. 2005). Among trichomycterids, the whole Copionodontinae , comprising two genera and seven species, is endemic to the Chapada Diamantina ( de Pinna 1992; Campanario and de Pinna 2000; Bichuette et al. 2008; de Pinna et al. 2018a b), whereas a recent study reported the occurrence of a new endemic species of the sarcoglanidine genus Ammoglanis Costa, 1994 , previously known only from the Amazon ( Costa et al. 2020d). Thus, in supporting a trichomycterine clade endemic to the Chapada Diamantina, this study corroborates that this area is an important centre for trichomycterid diversification.

Figures

Fig. 3. Geographical distribution of Ituglanis, indicating type localities of Ituglanis payaya and I. paraguassuensis.