xi, Rivulus Vermeulen [F. B. M.] 2013:56, Figs. 8-9 [Killi-Data Series 2013; ref. 33089] Santander, quebrada Playoncito, tributary of Río Betania, 40 km N from San Alberto to El Playón, Magdalena River basin, Colombia, 07°33'50"N, 73°13'90"W, elevation 588 meters. Holotype: IAVHP 11258. Paratypes: IAVHP 11259 (8), , RMNH.PISC 36367 (1). Type catalog: DoNascimiento et al. 2016:430 [ref. 34787]. •Valid as Rivulus xi Vermeulen 2013 -- (DoNascimiento et al. 2017:102 [ref. 35633]). •Valid as Cynodonichthys xi (Vermeulen 2013). Current status: Valid as Cynodonichthys xi (Vermeulen 2013). Rivulidae: Rivulinae. Distribution: Upper Magdalena River basin, Colombia. Habitat: freshwater.