(Megalonema) (Megalonema) is a biological genus in the family Pimelodidae (Longwhiskered Catfishes) and order Siluriformes (Catfishes).
Megalonema argentina
Megalonema pauciradiatum
Megalonema platanum
Megalonema platycephalum
Megalonema psammium
Megalonema xanthum
Aguarunichthys
Bagropsis
Batrochoglanis
Bergiaria
Brachyplatystoma
Calophysus
Cephalosilurus
Cheirocerus
Duopalatinus
Exallodontus
Goslinia
Hemisorubim
Iheringichthys
Leiarius
Luciopimelodus
Megalonema
Merodontotus
Parapimelodus
Perrunichthys
Phractocephalus
Pimelodina
Pimelodus
Pinirampus
Platynematichthys
Platysilurus
Platystomatichthys
Propimelodus
Pseudoplatystoma
Sorubim
Sorubimichthys
Steindachneridion
Zungaro