duplicatum, Characidium Armbruster [J. W.], Lujan [N. K.] & Bloom [D. D.] 2021:113, Fig. 10 [Ichthyology & Herpetology v. 109 (no. 1); ref. 38198] Kuribrong River, in rapids at Grass Shoals, Potaro-Essequibo River basin, Region 8 (Potaro-Siparuni), Guyana, 05.40791, -059.53179. Holotype: CSBD F-3614 [ex AUM 62835]. Paratypes: AUM, ROM. Plus additional non-type material. •Valid as Characidium duplicatum Armbruster, Lujan & Bloom 2021. Current status: Valid as Characidium duplicatum Armbruster, Lujan & Bloom 2021. Crenuchidae: Characidiinae. Distribution: South America: Potaro-Essequibo River basin, Guyana. Habitat: freshwater.