xanthum, Megalonema Eigenmann [C. H.] 1912:16 [Indiana University Studies No. 16 [sic No. 8]; ref. 1228] Girardot, Colombia. Holotype: FMNH 56032 [ex CM 4822]. Paratypes: (CM and IU) AMNH 5340 (7, 1 c&s); BMNH 1920.12.20.112-113 (2), 1924.3.3.83-84 (2); CAS 63674-75 [ex IU 12681-82] (11, 127); FMNH 10251 (1), 10284-89 (6), 77909 (7), 56032-33 (1, 9), 69818 (71), 95984 (3, c&s); MCZ 30961; UMMZ 190406 (7, 1 c&s); USNM 76930 (24), 79222 (5), 167852 (5). Type catalog: Henn 1928:76 [ref. 12305], Böhlke 1953:44 [ref. 12291], Ibarra & Stewart 1987:55 [ref. 12367], Ferraris & Vari 1992:34 [ref. 19771], Ferraris 2007:335 [ref. 29155]. •Valid as Megalonema xanthum Eigenmann 1912 -- (Burgess 1989:275 [ref. 12860] as xanthus, Lundberg & Littmann in Reis et al. 2003:438 [ref. 27061], Ferraris 2007:335 [ref. 29155], Lundberg & Dahdul 2008:442 [ref. 29853] in subgenus Eretmomegalonema, DoNascimiento et al. 2017:93 [ref. 35633]). Current status: Valid as Megalonema xanthum Eigenmann 1912. Pimelodidae. Distribution: Magdalena River basin, Colombia. Habitat: freshwater.