wangyapoik, Characidium Armbruster [J. W.], Lujan [N. K.] & Bloom [D. D.] 2021:117, Figs. 1A, 11-12 [Ichthyology & Herpetology v. 109 (no. 1); ref. 38198] Ireng River, first shoal upriver from split with Sukwabi Creek, Amazon River basin, Potaro-Siparuni (Region 8), Guyana (border with Brazil), 5.07711, -59.97423. Holotype: CSBD F-3615 [ex AUM 67118]. Paratypes: ANSP, AUM, CSBD, INPA, ROM. Plus additional non-type material. •Valid as Characidium wangyapoik Armbruster, Lujan & Bloom 2021. Current status: Valid as Characidium wangyapoik Armbruster, Lujan & Bloom 2021. Crenuchidae: Characidiinae. Distribution: South America: upper Ireng River basin, Guyana / Brazil border. Habitat: freshwater.