Pimelodella sp.

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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Pimelodella sp.


Pimelodella sp. 


Type status: Other material. Occurrence: catalogNumber: 43890; recordedBy: Valéria Nogueira Machado; Emanuell Duarte Ribeiro; Rupert A. Collins; individualCount: 1; otherCatalogNumbers: UFAM:CTGA:14290; associatedSequences: KP772572; Taxon: scientificName: Pimelodella; kingdom: Animalia; phylum: Chordata; class: Actinopterygii; order: Siluriformes; family: Heptapteridae; genus: Pimelodella; taxonRemarks: Species undetermined; Location: country: Brazil; stateProvince: Pará; locality: Lower Nhamunda River ; decimalLatitude: -1.6909; decimalLongitude: -57.42231; geodeticDatum: WGS84; Identification: identifiedBy: Rupert A. Collins; Event: eventDate: 2013-11; Record Level: institutionCode: INPA; basisOfRecord: PreservedSpecimenGoogleMaps 


Tentative identification to genus level follows Eigenmann and Eigenmann (1890) and Eigenmann (1917) based on the following characters: occipital process narrow, reaching dorsal plate; fontanel continued to base of occipital process, with bridge above the posterior margin of the eye; dorsal-fin and pectoral-fin spines strong; humeral process spine-like; and dorsal fin with six branched rays.

Given the large diversity of the group, and the paucity of modern treatments dealing with heptapterids, we are currently unable to identify this fish to species level, and our genus identification is tentative. Important characters include the caudal fin lobes of approximately equal length, maxillary barbels not surpassing anal fin (left barbel is damaged in our specimen), the complete lack of dark longitudinal stripe, the wedge-shaped mark on the dorsal-fin, and the dark saddle anterior to the dorsal fin.

One individual was caught by hand-net on a sandy beach habitat (adjacent to sampling site NH05). This specimen is pictured in Fig. 12.