A preliminary inventory of the catfishes of the lower Rio Nhamunda, Brazil (Ostariophysi, Siluriformes) Author Collins, Rupert A. Author Duarte Ribeiro, Emanuell Author Nogueira Machado, Valeria Author Hrbek, Tomas Author Farias, Izeni Pires text Biodiversity Data Journal 2015 3 4162 4162 http://dx.doi.org/10.3897/BDJ.3.e4162 journal article http://dx.doi.org/10.3897/BDJ.3.e4162 1314-2828-3-4162 Pseudolithoxus sp. "INPA 43888" Materials Type status: Other material . Occurrence: catalogNumber: INPA 43889; INPA 43888 ; recordedBy: Valeria Nogueira Machado; Emanuell Duarte Ribeiro; Rupert A. Collins ; individualCount: 17 ; otherCatalogNumbers: UFAM:CTGA:14422; UFAM:CTGA:14482; UFAM:CTGA:14483; UFAM:CTGA:14484; UFAM:CTGA:14485; UFAM:CTGA:14486; associatedSequences: KP772584; KP772590; KP772591; Taxon: scientificName: Pseudolithoxus; kingdom: Animalia; phylum: Chordata; class: Actinopterygii; order: Siluriformes; family: Loricariidae; genus: Pseudolithoxus; vernacularName: sp. "INPA 43888"; taxonRemarks: Undescribed species; Location: country: Brazil ; stateProvince: Para ; locality: Lower Nhamunda River ; decimalLatitude: -1.71782 ; decimalLongitude: -57.36856 ; geodeticDatum: WGS84; Identification: identifiedBy: Rupert A. Collins; Event: eventDate: 2013-11 ; Record Level: institutionCode: INPA ; basisOfRecord: PreservedSpecimen Notes Identification to genus level follows Armbruster and Provenzano (2000) and Lujan and Birindelli (2011) based on the following characters: three rows of lateral plates on the caudal peduncle; lateral plates without pronounced keels; fully plated snout lacking tentacles; hypertrophied odontodes on the snout in both females and males; lack of whisker-like odontodes on the cheek plates; extremely hypertrophied odontodes on an elongated pectoral-fin spine in both females and males; sucking disk without fimbriae; and greater than 20 teeth per jaw ramus. Using the above references we were unable to identify the specimens to species level, as the individuals differed from the colour patterns diagnostic of the other species in the genus. We hypothesise that these individuals represent a new species of Pseudolithoxus , and intend to document this in more detail in a separate publication. Seventeen individuals were captured by hand from crevices in rocky habitats exposed to strong current (sampling site NH08). Live colouration is shown in Fig. 23.