Argentagrion ambiguum (Ris, 1904)

Márquez, Javier A., Principe, Romina E., Berejnoi, Diego E., Rodríguez, José S., Bedano, José C. & Molineri, Carlos, 2019, Dragonflies and damselflies (Odonata) from Córdoba and San Luis provinces, Argentina, Check List 15 (2), pp. 327-337 : 331

Argentagrion ambiguum (Ris, 1904)

Figure 6

Material examined. 1 male and 1 female (in tandem) Site 5, J.A. Márquez col. 15-II-2017 ( UNRC-ZIIO 0238).

Identification. This species can be distinguished from the other Argentagrion species by the broadly bilobate posterior lobe of the prothorax in both sexes and the male cercus about twice as long as wide in dorsal view. The dorsal branch of the male paraproct is rounded and the dorsum of abdominal segments 3–8 is mostly black (von Ellenrieder 2008: figs 21, 23, 58, 66, 67).