Micrathyria hypodidyma Calvert, 1906

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 : 333-334

Micrathyria hypodidyma Calvert, 1906

Figure 16

Material examined. 1 male Site 3, R.E. Principe col. 20-XII-2017 ( UNRC-ZIIO 0126) and 2 males Site 4, J.A. Márquez col. 6-III-2018 ( UNRC-ZIIO 0130, 0131).

Identification. This species can be distinguished from other Micrathyria species by having 2 cells between the anal angle of the triangle and the Cuspl in the hind wing,

the arculus located at level of the second antenodal, or very close to it, and 2 linear wide pale stripes at the sides of the pterothorax. In males, the hamule projects anteri- orly, not surpassing the proximal margin of the anterior lamina, and the cercus in lateral view is approximately linear ( Calvert 1906).

The 3 specimens collected in Córdoba presented variations in wing venation, especially noticeable in the fore wing triangles ( Fig. 17). Specimen UNRC-ZIIO 0130 displayed free triangles in its fore wings, whereas specimen UNRC-ZIIO 0131 displayed crossed triangles in its fore wings. The last specimen UNRC-ZIIO 0126 presented asymmetry in fore wing triangles, displaying the left fore wing triangle crossed and the right fore wing triangle free.