Acanthagrion lancea Selys, 1876

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 : 330-331

Acanthagrion lancea Selys, 1876

Figure 4

Material examined. 1 male Site 7, J.A. Márquez col. 8-I-2018 ( UNRC-ZIIO 0224).

Identification. This species belongs to the Viridescens group, which is characterized by the double transverse

fold on the ental surface of the distal penis segment, the subbasal and subapical constrictions and dorsal tuber- cles on the male cercus, and the absence of a dark stripe along the second lateral thoracic suture. The Viridescens group is represented by 3 species in Argentina; among them A. lancea can be distinguished in having the distal segment of the penis broad and expanded at distal tip, the hollow lateral lobes of distal penis segment plainly vis- ible from below overlapping lateral margins of segment 2, and the dorsal tubercle of the cercus weakly developed ( Leonard 1977: figs 43, 44)