Abstract
ABSTRACT A new species of Farlowella is described from eighteen specimens collected in the upper rio Xingu basin, Mato Grosso State, Brazil. The new species is a member of the Farlowella nattereri species-group and can be distinguished from other members of the group, with exception of Farlowella jauruensis , by exhibiting a proportionally shorter snout. The new species is distinguished from F. jauruensis by differences on the cleithrum and plate morphology, by counts of pelvic and caudal-fin rays, and by the color pattern of the snout. The discovery of new lots of F. jauruensis , a species so far known only from the holotype, is also herein reported. This discovery represents a considerable expansion of the geographic distribution and of the number of known specimens of F . jauruensis .
Highlights
Loricariinae is a subfamily of armored catfishes that currently comprises about 32 genera and near 240 valid species (Rodriguez et al, 2011; Eschmeyer & Fong, 2016) recognized by exhibiting a long and depressed caudal peduncle and by the absence of an adipose fin (Covain & Fisch-Muller, 2007)
Recent investigations conducted on collection material of the Museu de Zoologia da Universidade de São Paulo (MZUSP) assigned to the genus Farlowella revealed an undescribed species from the rio Xingu basin, Mato Grosso State, Brazil
The goal of this article is to provide a formal description of the new species of Farlowella from the Xingu basin and present the first records of F. jauruensis after its formal description performed by Eigenmann & Vance (1917), representing a considerable expansion of the geographic distribution of the later species
Summary
Loricariinae is a subfamily of armored catfishes that currently comprises about 32 genera and near 240 valid species (Rodriguez et al, 2011; Eschmeyer & Fong, 2016) recognized by exhibiting a long and depressed caudal peduncle and by the absence of an adipose fin (Covain & Fisch-Muller, 2007). Among the Loricariinae, Farlowella Eigenmann & Eigenmann is the second richest genus in the subfamily with 27 valid species (Ballen & Mojica, 2014; Eschmeyer et al, 2016). The genus was revised by Retzer & Page (1996) who proposed an intrageneric arrangement consisting of species groups. The taxonomy of these groups was based mainly on the number, shape, and location of dermal plates and odontodes. The goal of this article is to provide a formal description of the new species of Farlowella from the Xingu basin and present the first records of F. jauruensis after its formal description performed by Eigenmann & Vance (1917), representing a considerable expansion of the geographic distribution of the later species
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