Eurystylus

Yasunaga, Tomohide, Nakatani, Yukinobu & Chérot, Frédéric, 2017, Review of the mirine plant bug genus Eurystylus Stål from Japan and Taiwan (Hemiptera: Heteroptera: Miridae: Mirinae), with descriptions of two new species, a new synonymy and a new combination, Zootaxa 4227 (3), pp. 301-324 : 306

Key to Eurystylus and four assumed related genera in Asia

1. Frons with a pair of fuscous, velvety spots along inner margins of eyes; antennal segment I distinctly flattened; pronotal collar thicker than base of antennal segment II; basal margin of scutellum shorter than lateral margin................ Eurystylus

- Frons without such spot; antennal segment I cylindrical, not flattened; collar as thick as or narrower than base of antennal segment II; scutellum forming nearly equilateral triangle......................................................2

2. Antennal segment II shorter than basal width of pronotum; abdomen wider than hemelytron, with lateral margins of sterna partly visible in dorsal view................................................................. Heteropantilius

- Antennal segment II as long as or longer than basal width of pronotum; abdomen narrower than hemelytron..............3

3. Basic coloration of body pale brown, partly tinged with red, or sometimes uniformly creamy white; labium long, reaching metacoxa................................................................................... Eocalocoris

- Basic coloration brick-red, dark reddish brown to fuscous; pronotum and scutellum often with darker longitudinal stripes; labium short, not exceeding middle of mesocoxa.............................................................4

4. Body smaller, less than 7.0 mm (body length 8.0 mm in continental Chinese Ep. hirtipes Zheng & Liu ); scutellum more or less tumid ( Fig. 9 A–B) or sometimes strongly inflated medially ( Fig. 9 C–E)................................ Eurystylopsis

- Body larger, more than 8.5 mm; scutellum almost flat................................................. Miyamotoa

Figures

FIGURE 9. Habitus images of Eurystylopsis species (Nepal) & type specimens of E. harmandi (E) & Pseudeurystylus clavicornis (F). A. E. clavicornis in Kirtipur, Nepal (same individual of Fig. 8 G). B. E. clavicornis, female (= Fig. 8 H). C – D. Live individual probably corresponding to E. harmandi from Langtang Himal. E. E. harmandi, syntype female from India (Dardjiling) (MNHN). F. Pseudeurystylus clavicornis, holotype male from Australia (Sydney) (MZHF). Scale bars for (E & F) 1 mm.