“…Taxonomic composition of the Ephemeroptera assembly: There are nine Ephemeroptera families reported for Colombia (Salles et al, 2020), four were recorded in this study: Baetidae, Leptohyphidae, Leptophlebiidae and Caenidae. These correspond to 44.4% of registered families in the country and they have the largest number of genera and species recorded (Dias et al, 2009;Forero-Céspedes et al, 2014;García et al, 2013;Gutiérrez & Reinoso-Flórez, 2010;Gutiérrez et al, 2013;Gutiérrez & Llano, 2015;Hoyos et al, 2014;Molineri, 2014;Molineri et al, 2011;Motta-Díaz et al, 2012;Rozo & Salinas, 2016;Salinas et al, 2011Salinas et al, , 2012Salinas et al, , 2013Salinas-Jiménez et al, 2017Vinasco-Mondragón & Zúñiga, 2016;Zúñiga et al, 2014Zúñiga & Torres-Zambrano, 2015). Baetidae and Leptohyphidae were the most abundant and frequent in the different sampling stations, similar to what was found by Zamora (2015) in Orinoquia piedmont streams, where he further reported Leptophlebiidae and Oligoneuriidae.…”