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 Trachycorystes trachycorystes (Valenciennes, 1840) Materials Type status: Other material . Occurrence: catalogNumber: 43897 ; recordedBy: Valeria Nogueira Machado; Emanuell Duarte Ribeiro; Rupert A. Collins ; individualCount: 2 ; otherCatalogNumbers: UFAM:CTGA:14428; UFAM:CTGA:14429; associatedSequences: KP772586; Taxon: scientificName: Trachycorystes trachycorystes (Valenciennes, 1840); kingdom: Animalia; phylum: Chordata; class: Actinopterygii; order: Siluriformes; family: Auchenipteridae; genus: Trachycorystes; specificEpithet: trachycorystes; scientificNameAuthorship: (Valenciennes, 1840); Location: country: Brazil ; stateProvince: Para ; locality: Lower Nhamunda River ; decimalLatitude: -1.67511 ; decimalLongitude: -57.47678 ; geodeticDatum: WGS84; Identification: identifiedBy: Rupert A. Collins; Event: eventDate: 2013-11 ; Record Level: institutionCode: INPA ; basisOfRecord: PreservedSpecimen Notes Identification to species level follows Britski and Akama (2011) based on the following characters: lower jaw prognathus; skull roof covered by thin integument; inner mental barbel reaching base of outer mental barbel; dorsal-fin spine serrated only along anterior margin; and caudal fin emarginate (our specimens had suffered damage to the lobes of the caudal fin, presumably due to piranhas). Two individuals were caught at night using gill nets set in the margins of the main river. An example of a live specimen is pictured in Fig. 8.