Evinus Dlabola

Lu, Lin & Zhang, Yalin, 2011, New tribal placement for the leafhopper genus Evinus Dlabola (Hemiptera: Cicadellidae: Deltocephalinae), with description of a new species from China, Zootaxa 2794, pp. 52-56 : 52-53

Genus Evinus Dlabola , new record for China

Evinus Dlabola, 1977: 243 –245; Anufriev, 1994, 73: 116–119; Zahniser and Dietrich, 2008, 6: 1–24. Type-species: Evinus graminicolus Dlabola, 1977: 74

Remarks. Members of the genus are superficially similar externally to some members of the tribe Hecalini where Evinus was placed by Dlabola (1977) and Anufriev (1994), but Evinus differs from the latter in having the ocelli distant from the eyes, the forewings with two subapical cells (Fig. 1D), hindwings with 2nd apical cell stalked (Fig. 1I), and male pygofer without broad ventral lobes, characters not found in Hecalini. Recently, it was found to share some characters of the female genitalia with some members of the tribe Macrostelini , e.g., the first valvula with dorsal sculpture granulose, not reaching dorsal margin, with apicoventrally granulose area; the second valvula gradually expanded from midlength to near apex and dorsal margin without teeth. Although the sculpturing pattern and position (submarginal) are quite similar in Hecalini, the shape of the apicoventral sculptured area of the first valvula is different. In Hecalini it is longer and closely follows the ventral margin for a longer length than in Evinus . Also, the shape of the second valvulae in Hecalini are different being more distinctly humpbacked with a concave ventral margin (Figs. 1L-O) ( Zahniser and Dietrich, 2008).

Based on figures in Knight and Webb (1993), the characters of the female genitalia of Evinus appear most similar to Masafuera , Cicadulella, Elaronia , Paracicadula , and Balclutha but it also similar to Nesoclutha Evans , in general appearance and to Macrosteles Fieber in head markings. However, it differs from all these and other genera by its male genitalia, particularly its short subgenital plate with a remarkable triangular lobe directed dorsally on the outer margin ( Fig. 2 F), and in the female the lack of teeth on the second valvulae (Fig. 1O) is also distinctive.

In general, because Evinus has more similarities to Macrostelini than to Hecalini, we formally place it in the former tribe but as noted above, based on molecular analyses there is still some question regarding its phylogenetic position within Deltocephalinae .

Figures

FIGURE 2. Evinus macrospinus sp. n. A – C, E, F, H – J, male terminalia: A, genital capsule, lateral view; B, C, anal tube, lateral and dorsal view; E, F, subgenital plate, ventral and lateral ventral view; H, aedeagus, lateral view; I, aedeagus, connective, style and subgenital plate, dorsal view; J. valve; D, female pregenital sternite; G, left anterior tentorium.