A new species of Panaqolus
is described from material from the Takutu River and
the mainstream Rio Branco. It had previously been
given the L-number of 306 before this description.
Description: The new species is diagnosed
from congeners by its colour pattern consisting of
dark and light bars on the body, bands on the fins,
and with dots and vermiculations absent (vs. no bars
P. nocturnus, and P. koko, vs. fins
unbanded in P. albomaculatus, P.
P. koko, and P. nix , and vs. dots
and vermiculations present in P.
). The new species is diagnosed from barred species
of Panaqolus by its specific bar number and
orientation and colour pattern on its head, with bars
oriented in a anteroventral-posterodorsal direction
(vs. anterodorsal-posteroventral bars in P.
), having consistently 5 bars (n = 4) on the trunk
that do not increase with size (vs. number increasing
with size in P. purusiensis and vs. 6-12
), and the colour pattern on the head of straight
lines extending from posterior to the eye to the snout
margin, splitting in the middle portion of the line
in larger specimens (vs. small, dense reticulate lines
in P. changae ). Biogeographically, we infer
that the new species ancestrally originated in the
Amazon river, dispersing to the Takutu River after
the Amazon captured part of the Proto-Berbice. (Milton
Tan et.al. 2016). The differences between the Panaqolus
and the Panaque genera is that the latter
has an oval shaped mouth and the jaws have very large
spatulate teeth with a single cusp, arranged in a
v form and Panaqolus have a small number
of spatulate teeth and are also a smaller genus. Aquarium
Care: Peaceful in the aquarium
but not suitable for planted tanks as they are plant
eaters. Tank set-up should contain wood of some description
as the Panaques need this in their diet. Plants will
not work too well as they will be eaten so plenty
of wood scattered around the tank with a few caves
for spawning activities on a sand or small rounded
gravel bed will do just fine. Provide strong aeration
due to the higher temperatures involved. Diet:
All Panaques and also the Panaqolus
genera are wood eaters so would need this in an aquarium
set-up. Feed also vegetable foods such as cucumber,
courgette (zucchini) and sinking tablets. Sexual
Differences: Males have long interopercular
spines and their body is adorned with hair-like spines.
Etymology: From the Latin claustellum,
meaning keyhole, and the Latin fero, meaning to bear.
Refers to the dark brown lines on the snout surrounding
a keyhole-like shape of light-brown base colouration.
Treated as a masculine adjective.
Takutu river and the mainstream rio Branco of Brazil
2008. Back to Nature guide to L-catfishes, Ettlingen,
Germany 208 p Milton Tan , Lesley S. de Souza, Jonathan
W. Armbruster. 2016. A new species of Panaqolus
(Siluriformes: Loricariidae) from the rio Branco Neotropical
ichthyology vol.14 no.2, 2016 Epub July 07, 2016