Trachycorystes trachycorystes (Valenciennes, 1840)

Collins, Rupert A., Duarte Ribeiro, Emanuell, Nogueira Machado, Valeria, Hrbek, Tomas & Farias, Izeni Pires, 2015, A preliminary inventory of the catfishes of the lower Rio Nhamunda, Brazil (Ostariophysi, Siluriformes), Biodiversity Data Journal 3, pp. 4162-4162 : 4162

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Trachycorystes trachycorystes (Valenciennes, 1840)


Trachycorystes trachycorystes (Valenciennes, 1840)


Type status: Other material. Occurrence: catalogNumber: 43897 ; recordedBy: Valéria 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: Pará; 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 GoogleMaps


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.