Synonyma
Eretmomegalonema Lundberg & Dahdul, 2008 ― Megalonema xanthum Eigenmann, 1912
Typový druh
Megalonema platycephalum Eigenmann, 1912.
Původní popis
Eigenmann C. H. 1912. The freshwater fishes of British Guiana, including a study of the ecological grouping of species, and the relation of the fauna of the plateau to that of the lowlands. Mem. Carnegie Mus. v. 5 (no. 1). i-xxii + 1-578.