All FishesLoricariidaeHypostominaePseudolithoxus

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Scientific NamePseudolithoxus kinja   
Common NamesL385
Pronunciationsue doh lith ox uss.
EtymologyGreek, pseudes = false + Greek, lithos = stone + Greek, oxys = sharp. ‘Kinja’, meaning the ‘true people’, is how the Waimiri-Atroari indigenous people refer to themselves. The Kinja people inhabit areas surrounding the rio Uatuma and part of the rio Negro in the states of Amazonas and Roraima, Brazil.
Hop to next section Species Information
Size 171mm or 6.7" SL. Find near, nearer or same sized spp.
IdentificationPseudolithoxus 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, P. kinja can be diagnosed from P. anthrax and P. nicoi by having dark bands on the caudal fin (vs. absence).
SexingYoung specimens and fully reproductive males have a urogenital papilla which is well-developed as a small elongate tube located immediately behind the anal opening. This small tube is almost perpendicular to the main plane of the body, facing ventrally with a tiny opening at the tip. The condition in females is similar to that found in other hypostomines. In mature males with developed testes, the third branched pelvic-fin ray becomes elongated, and the whole fin becomes lanceolate. In the anal fin of mature males, the second simple ray becomes almost twice the length of the first short ray, and the first, second, and third branched rays also become elongate (the third the longest); owing to this fin-ray elongation in mature males, the whole anal fin becomes larger and has a strongly curved posterior border rather than the regular straight border usually seen in females or non-reproductive males.
General RemarksL385 was first reported from the rio Trombetas. L492 was first reported from the rio Jauaperi.
Hop to next section Habitat Information
DistributionRio Uatuma, rio Nhamunda and rio Guariba (rio Madeira-Aripuana drainage).
Amazon, Lower Amazon, Trombetas (click on these areas to find other species found there)
Amazon, Lower Amazon, Nhamundá (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Negro, Lower Negro, Jauaperi (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Madeira, Aripuanã, Guariba (click on these areas to find other species found there)
Amazon, Lower Amazon, Uatumã (click on these areas to find other species found there)
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Other ParametersIn the wild, water temperature and conductivity were 28.3C and 6 mS/cm at one collection site. The river was a clearwater river with strong current.
Hop to next section Husbandry Information
FurnitureThis species is found in shallow, fast-flowing water over a substrate of eroded bedrock, living amongst narrow cracks between rocks. The species was not found associated with woody-debris sites, or rocky sites lacking any appreciable water current.
Suggested TankmatesIn nature, this fish is found living with Leporinus, Symphysodon, Cichla, Pimelodella, Tatia, Dekeyseria, Peckoltia, and Lasiancistrus.
Hop to next section Further Information
ReferencesCollins RA, Bifi AG, de Oliveira RR, Ribeiro ED, Lujan NK, Rapp Py-Daniel LH, & Hrbek T. (2018). Systematics & Biodiversity, DOI: 10.1080/14772000.2018.1468362.
Registered KeepersNone.
Breeding ReportsNone.
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Last Update2018 May 23 11:00 (species record created: 2006 Dec 19 04:16)