macropus, Xenurobrycon Myers [G. S.] & Miranda Ribeiro [P. de] 1945:5, Fig. 1 [Boletim do Museu Nacional do Rio de Janeiro, Zoologia, Nova Série No. 32; ref. 3131] Rio Bodoquena, Rio Paraguay system, Matto Grosso, Brazil. Holotype: MNRJ ?. Paratypes: CAS-SU 40764 (2). Other paratypes in MNRJ (14). Type catalog: Böhlke 1953:27 [ref. 12291]. •Valid as Xenurobrycon macropus Myers & Miranda Ribeiro 1945 -- (Weitzman 1987:113 [ref. 5982], Weitzman & Burns 1997:139 [ref. 24512], Britski et al. 1999:49 [ref. 24147], Malabarba & Weitzman 2000:280 [ref. 24413], Weitzman in Reis et al. 2003:228 [ref. 27061], Moreira 2005:855 [ref. 28474], Thomaz et al. 2015:Add. 5 [ref. 33893], Mendonça et al. 2016:[7] [ref. 34350], Koerber et al. 2017:35 [ref. 35267], Menezes & Camelier 2024:285 [ref. 40817]). Current status: Valid as Xenurobrycon macropus Myers & Miranda Ribeiro 1945. Characidae: Stevardiinae. Distribution: South America: Paraguay River basin, Brazil and Paraguay. Habitat: freshwater.