orixanthum, Megalonema Lundberg [J. G.] & Dahdul [W. M.] 2008:450, Fig. 7 [Neotropical Ichthyology v. 6 (no. 3); ref. 29853] Río Metica, about 3 kilometers southeast of Hacienda Mozambique, 3°57'N, 73°02'W, Meta State, Colombia. Holotype: ANSP 187449. Paratypes: many at ANSP (most specimens), FMNH, IAvH-P, MBUCV-V, MZUSP, USNM. Type catalog: DoNascimiento et al. 2016:414 [ref. 34787]. •Valid as Megalonema orixanthum Lundberg & Dahdul 2008 in subgenus Eretmomegalonema -- (DoNascimiento et al. 2017:93 [ref. 35633], Lasso in Lasso & Morales-Betancourt 2022:236 [ref. 40783]). Current status: Valid as Megalonema orixanthum Lundberg & Dahdul 2008. Pimelodidae. Distribution: South America: Orinoco River basin (Colombia and Venezuela). Habitat: freshwater.