Pseudolithoxus sp. "INPA 43888"

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

Pseudolithoxus sp. "INPA 43888"

Materials

Type status: Other material. Occurrence: catalogNumber: INPA 43889; INPA 43888 ; recordedBy: Valéria 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: Pará; 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.