Species of Parapimelodus have extremely long
gill rakers and more than 55 gill rakers on the first
branchial arch, which is related to feeding on plankton.
They also have very large eyes on the sides of the
head that can be seen both from above and below, which
is related to independence from the bottom in locomotion
and feeding; though a common trait in many other catfish,
it is rare in Pimelodids.
Paraná River basin. Type locality:
ArgentiNat 2021. Froese, R. and D. Pauly. Editors.
2015. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 04/2015 ). Lucena, C.A.S., L.R.
Malabarba and R.E. Reis,
1992. Resurrection of the neotropical pimelodid catfish
Parapimelodus nigribarbis (Boulenger), with a phylogenetic
diagnosis of the genus Parapimelodus (Teleoastei:
Siluriformes). Copeia 1992(1):138-146.