A new species of Americabaetis (Baetidae: Ephemeroptera) from Andean region, Colombia

A new species of Americabaetis Kluge, 1992 is described based on nymphs from Colombia. The new species can be recognized by: (1) frontal keel present; (2) lingua broadly pointed apically; (3) glossa 0.7× length of paraglossa; (4) apex of paraglossa with three rows of pectinate setae; (5) segment II of labial palp with a moderate distomedial projection; (6) posterior margin of abdominal terga with rounded spines. A key for the identification of the South American species of Americabaetis is presented.