Phractocephalus hemioliopterus

Phractocephalus hemioliopterus (Bloch and Schneider, 1801) is a species of actinopterygii belonging to the family Pimelodidae (order Siluriformes).

Common name. In English this species is commonly known as the pirarara.

Taxonomy. The scientific name Phractocephalus hemioliopterus (Bloch and Schneider, 1801) places this species within the actinopterygii lineage, among the most diverse vertebrates on Earth.

Description & ecology. As a member of Siluriformes, Phractocephalus hemioliopterus exhibits the group's characteristic adaptations: They are chiefly freshwater fishes bearing sensory barbels ('whiskers') and often a venomous dorsal or pectoral spine. Its biology reflects the demands of its particular habitat and life history within the family Pimelodidae.

Distribution. The species occurs within the natural range of its lineage; precise localities and depth preferences are documented in the taxonomic literature for Pimelodidae.

Human relevance. Like many fishes, it may be of interest to fisheries, aquaculture, the aquarium trade, or conservation, depending on its abundance and distribution.