roulini, Potamotrygon Roberts [T. R.] (ex Roulin) 2021:95, Figs. 1-4 [aqua, International Journal of Ichthyology v. 26 (no. 3-4) [for 2020]; ref. 38077] Small stream near Giramena, Meta drainage, upper Orinoco basin, Colombia. Holotype (unique): IAVHP 16138. Based on the "Raya tachetée" or "Raja cascabel" of Roulin 1829 [ref. 26350]. For availability and validity see discussion in Silva et al. 2021:597 [ref. 39258]. •Synonym of Potamotrygon orbignyi (Castelnau 1855) -- (Silva et al. 2021:599 [ref. 39258]), Current status: Synonym of Potamotrygon orbignyi (Castelnau 1855). Potamotrygonidae: Potamotrygoninae. Habitat: freshwater.