Roxo FF, Ochoa LE, Silva GSC, Oliveira C (2015)
contributors to this species:
Fábio F. Roxo
Rhinolekos capetinga diffrs from R. garavelloi
and R. schaeferi in that it has a lower number
of vertebrae, 31 (vs. 32) and the anterior portion
of the compound supraneural-fist dorsal-fi proximal
radial contacts the neural spine at the 9th vertebra
(vs. 10th, Fig. 2a). The new species can be distinguished
from R. britskii by the absence of transverse
dark bands in the pectoral, pelvic and anal-fin rays
(vs. present), lower number of plates in the dorsal
series 24–28 (vs. 30–35), lack of odontodes
on the ventral tip of the snout (vs. tip of snout
completely covered by odontodes), and by having a
greater prenasal length, 41–60% of HL (vs. 32–40%
of HL). Moreover, the new species differs from R.
schaeferi by the absence of accessory teeth (vs.
present) and from all congeners by the smaller head
length, 20–27% of SL (vs. 28–32% of SL
in R. britskii; 29–35% of SL in R.
garavelloi; 29–32% of SL in R. schaeferi),
and by the greater snout length, 61–85% of HL
(vs. 52–57% of SL in R. britskii; 49–60%
of SL in R. garavelloi; 53–59% of SL
in R. schaeferi). It diffrs from R. britskii and R.
garavelloi by the smaller caudal-peduncle depth, 6–9%
of SL (vs. 9–11% of SL in R. britskii and 10–13%
of SL in R. garavelloi); it differs from
R. garavelloi by the smaller thoracic length
10–15% of SL (vs. 18–21% of SL), and by
the smaller folded dorsal-fin length, 14–21%
of SL (vs. 22–26% of SL). Adult males are distinguished
by having a papilla at the urogenital opening (vs.
papilla absent in females), and by an unbranched pectoral-
and pelvic-fin ray supporting a dermal flp on their
proximal dorsal surface in males. Habitat:
Occurs on flat areas of the córrego da Branca
and córrego Roncador, rio Tocantins basin,
in areas with shallow clear waters, about 1 m depth
and median to fast current flow. Found in association
with the vegetation that covers the bottom and the
border of the headwaters. Etymology:
The specific name (capetinga) is taken from
the Tupi-guarani dialect in reference to the old and
unused name of São João D´Aliança
municipality. The name 'capetinga" refers to
white, or clear water. A noun in apposition.
Brazil, known from two localities at the córrego
da Branca and one locality at the córrego Roncador,
all drainages of the rio Tocantizinho, rio Tocantins
Froese, R. and D. Pauly.
Editors. 2020. FishBase. World Wide Web electronic
publication. www.fishbase.org, version (04/2020). Roxo FF, Ochoa LE, Silva
GSC, Oliveira C.
(2015) Rhinolekos capetinga: a new cascudinho species
(Loricariidae, Otothyrinae) from the rio Tocantins
basin and comments on its ancestral dispersal route.