Diagnostic Description
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SL/Depth 3.7-4.8. Head 3.9-4.7 x SL, 3.6-5.2 x bigger than eye diameter. Pectoral fins 1.1-1.4 x head length, posterior end reaching origin of pelvic fins (which is 1.7-2.2 x length if pectorals). Dorsal and anal fin origins at same level. Caudal peduncle height 2.1-3.2 x of its length. Color uniformly dark, almost black (Upper Niger); Middle Niger individuals light colored with small dots of melanophores.
Migration
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Potamodromous. Migrating within streams, migratory in rivers, e.g. Saliminus, Moxostoma, Labeo. Migrations should be cyclical and predictable and cover more than 100 km.
Morphology
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Dorsal spines (total): 0; Dorsal soft rays (total): 20 - 23; Analspines: 0; Analsoft rays: 23 - 26
Biology
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Affinities: sympatric with P. isidori.