Your internet guide to
all things catfish









Back to Family page Back to Family page

Pseudancistrus asurini Silva, Roxo & Oliveira, 2015

Image contributors to this species:

Johnny Jensen's Photographic Library (5) Haakon Haagensen (1)

ScotCat Sources:

Etymology = Genus Etymology = Species 

Other Sources:

Fishbase  Search Google  All Catfish Species Inventory

Relevant Information:

The new species 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. barbatus by having the snout with yellowish odontodes (vs. reddish-brown) (see Fig. 3 in De Chambrier and Montoya-Burgos 2008 for comparison) and from P. nigrescens, P. corantijniensis, and 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 Hopliancistrus sp. (L017), the confusion arising from the 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 green diet. Remarks: as of Feb. 2015 this species is not yet on the Fishbase and Catalog of Fishes databases.

Common Name:







Brazil: from the rio Xingu, municipality of Altamira, from the Xingu river basin, Pará State.


25cm. (9¾ins)


26-30°c (79-87°f.)




Seidel, I. 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.



Back to Family page Back to Family Back to Family page

















































































                                                                                                                                                                           updated = November 16, 2018 © ScotCat 1997-2018