kinja Bifi, de Oliveira,Rapp Py-Daniel
& Collins, 2018
contributors to this species:
Rupert Collins (1)
Andreas Tanke (4)
The genus Pseudolithoxus
now includes six species, P.
dumus, P. nicoi, P.
and now the new species
described in Collins et.al. 2018 P. kinja.
Previously described as the Lasiancistrus anthrax
group. Description: They are characterized
by evertible cheek plates, a very dorsoventrally flattened
body, extremely hypertrophied odontodes (integumentary
teeth) on elongated pectoral spines and along the
snout margin, and 3 rows of plates on the caudal peduncle.
In addition, it appears as if females as well as males
develop hypertrophied snout and pectoral-fin odontodes,
traits normally restricted to nuptial males in other
Loricariids. Dorsal spines (total): 2; Dorsal soft
rays (total): 7; Anal spines: 1; Anal soft rays: 5.
Body and head with numerous black bars. Lateral line
plates 23-24; dorsal plates 7-8; interdorsal plates
4-5; adipose-caudal plates 7-8; folded dorsal fin
plates 11-12; and postanal plates 11-12. Colouration:
Pseudolithoxus kinja is diagnosed from all congeners
by having a colour pattern of large pale spots on
a dark background (vs. pale bands on a dark background
in P. kelsorum and P. tigris; small
pale dots on a dark background in P. anthrax
and P. nicoi; dark spots on a lighter background
in P. dumus). Furthermore, Pseudolithoxus
kinja can be diagnosed from P. anthrax
and P. nicoi by having dark bands on the
caudal fin (vs. absence); and cleithral width 30.0–33.5%
SL (vs. 27.2–30.5% in P. anthrax and
27.0–28.6% in P. nicoi; data from Armbruster
& Provenzano, 2000).
L385, L492, Pseudolithoxus
sp. "Rio Nhamunda".
Brazil, Rio Nhamunda.
Rupert A. Collins,
Alessandro G. Bifi, Renildo R. de Oliveira, Emanuell
D. Ribeiro, Nathan K. Lujan, Lúcia H. Rapp
Py-Daniel & Tomas Hrbek.
Biogeography and species delimitation of the rheophilic
suckermouth catfish genus Pseudolithoxus (Siluriformes:
Loricariidae), with the description of a new species
from the Brazilian Amazon. www.suedamerikafans.de