The new species (2015) differs from all congeners
by having the dorsal and caudal-fin tips whitish (vs.
entirely dark). It further differs from P. reus
and P. kayabi by having conspicuous whitish
spots on the body (vs. body mottled or with bars in
P. reus and with whitish spots that fade
along the body and can cover more than one plate in
P. kayabi). It is also distinguishable from
P. depressus and P.
having the snout with yellowish odontodes (vs. reddish-brown)
(see Fig. 3 in De Chambrier and Montoya-Burgos 2008
for comparison) and from P.
zawadzkii by having smaller whitish
spots covering the body which increase gradually in
size on the head (diameter 0.3-0.8 mm) and further
on the body (diameter 0.7-1.3) (vs. spots abruptly
increasing size between the head (diameter 1.1-1.3)
and the body (diameter 2.6-2.3 mm). In addition, the
new species is distinguished by a shorter predorsal
length, 39-43% SL (vs. 43-46% in P. zawadzkii
and 43-45% in P. nigrescens), a smaller dorsal
pectoral depth, 23-27% SL (vs. 27-31% in P. zawadzkii);
a smaller caudal peduncle depth, 9-11% SL (vs. 13-14%
in P. zawadzkii and 13% in P. nigrescens),
a shorter barbel, 5-9% HL (vs. 10-11 in P. nigrescens),
and head depth, 57-66% SL, which is smaller than in
P. zawadzkii (67-73%) but greater than in
P. barbatus (41-53%). This genera posses
a flattened body form with a large mouth with numerous
teeth. Often confused with Hopliancistrussp.
(L017), the confusion arising fromthe same colouring of yellow in the tail
fin and coming from the same river system, but was
without an L-number. Our Pseudancistrus species
was firstly given the L-number L017 but it was later
given over to the Hopliancistrus species
and our species is L067 and now it has been named
by Silva et al. (2015). Aquarium Care:
Not the easiest species to maintain in the aquarium
as it will need pristine water conditions with well
filtered water which should not be too hard. Warm
water should be the norm. Adult males are very territorial
and will not get on with other large Loricariid catfish.
Sexual Differences: Males have a
broad head and posses long bristles along the edge
of the snout. Diet: Aufwuch grazer,
mainly vegetarian, with lettuce, spinach, cucumber
and courgette (zucchini), vegetarian flake and tablets.
Will eat other foods also such as insect larvae, zooplankton
and soft wood but will need to be kept on a mainly
From the rio Xingu, municipality of Altamira, from
the Xingu river basin, Pará State.
2008. Back to Nature guide to L-catfishes, Ettlingen,
Germany 208 p. Silva, G.S.C., Roxo, F.F. & Oliveira,
C. (2015). "Two new species of Pseudancistrus
(Siluriformes, Loricariidae) from the Amazon basin,
northern Brazil". ZooKeys, 482: 21–34.