Dragonflies and damselflies (Odonata) from Córdoba and San Luis provinces, Argentina Márquez, Javier A. Principe, Romina E. Berejnoi, Diego E. Rodríguez, José S. Bedano, José C. Molineri, Carlos Check List 2019 2019-04-19 15 2 327 337 6N9JB Selys, 1876 Selys 1876 [813,1157,1265,1290] Insecta Coenagrionidae Ischnura Animalia Odonata 4 331 Arthropoda species fluviatilis   Figure 7   Material examined. 1 maleSite 7, J.A. Márquez col. 8-I-2018( UNRC-ZIIO0339).  Identification.This species can be distinguished from the other 2 species of  Ischnurain Argentinain having the outer branch of the male cercus shorter than the inner branch ( von Ellenrieder and Garrison 2007: fig. 95).