Eurystylopsis crassicornis (Poppius) Poppius, 2017

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 : 320-323

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Eurystylopsis crassicornis (Poppius)

n. comb.

Eurystylopsis crassicornis (Poppius) n. comb.

Figs. 8 View FIGURE 8 D–F, 10D–E

Eurystylomorpha crassicornis Poppius, 1915: 17 (n. sp.); Schuh, 1995: 765 (cat.); Kerzhner & Josifov, 1999: 98 (cat.); Zheng et al., 2004: 263 (diag.); Schuh (2002–2014) online catalog.

Diagnosis. Recognized by its rather conventional mirine shape, generally dark, largely matte, elongate ovoid body; simple, reclining setae and silvery or partly golden pubescence on dorsum; basally constricted interramal lobe with narrowly sclerotized edge; and Y-shaped dorsal structure. This species (male and reddish female) is at first sight similar to E. clavicornis ( Figs. 8 View FIGURE 8 H–I, 9A–B), from which E. crassicornis can be distinguished by the larger size, long antennal segment II longer than the metatibia, and thick-rimmed, squared sclerotized ring.

Description. Female: Similar to male, but dorsum sometimes partly or largely mottled with reddish patterns. Body generally dark brown, elongate ovoid; dorsal surface weakly shining, partly or largely tinged with red, with two types of vestiture: uniformly distributed, simple, short, brownish, reclining setae and densely distributed, silvery (party golden), reclining or semierect setae ( Fig. 10 View FIGURE 10 C). Antenna dark brown; basal half of segment II reddish brown; bases of segments III and IV yellowish brown. Labium shiny chocolate brown, not exceeding apex of mesocoxa. Pronotum uniformly darkened, with narrowly pale basal margin (but in some specimens pronotum and scutellum largely reddish brown with fuscous stripes as in Fig. 9 View FIGURE 9 B); scutellum with reddish apex, moderately tumid; pleura dark brown, with grayish yellow scent efferent system ( Fig. 8 View FIGURE 8 F). Hemelytron uniformly dark brown, more or less tinged with red; median part of cuneus yellow; membrane smoky brown, with semitransparent, irregular maculae at middle. Coxae and legs dark brown; each trochanter pale brown; apical half parts of pro- and mesotibiae (except for dark apices) and median part of metatibia pale reddish or yellowish brown. Abdomen dark brown. Female genitalia ( Fig. 10 View FIGURE 10 D–E): Genital chamber with distinct sclerotized perimeter surrounding lateral oviducts; sclerotized rings developed, rather squared ( Fig. 10 View FIGURE 10 D); interramal lobes somewhat constricted basally, with narrowly sclerotized lateral margin ( Fig. 10 View FIGURE 10 E).

Measurements. ♀: Total body length 5.8̄6.3; width of head across eyes 1.04̄1.09; width of vertex 0.43̄0.48; lengths of antennal segments ĪIV 0.95̄0.97, 2.66̄2.85, 0.95̄1.11, 0.58̄0.67; length of labium 1.99̄2.04; mesal length of pronotum including collar 1.23̄1.26; basal width of pronotum 1.99̄2.09; maximum width across hemelytron 2.28̄2.40; and length of metafemur, tibia and tarsus 2.47̄2.57, 3.41̄3.43, 0.64̄0.67. According to Poppius (1915), body length 6.2 and maximum width 2.2 in holotype male. Biology. Unknown.

Material examined. Holotype Ƌ, TAIWAN, Fuhosho [= current Samkiap , New Taipei City, 24.88, 121.39], H. Sauter (without USIs, image examined, Fig. 8 View FIGURE 8 D). Additional material . TAIWAN: Nantou County: 1♀, Puli, Wushe, 24.02, 121.11, S. Gotoh ( TYCN) ; 2♀, same data except for date, 21 May 1989 , 1♀ with USIs (AMNH_PBI 00380487) (NMNS, TYCN); 2♀, Alishan Township , 20 May 1989, S. Gotoh ( NMNS, TYCN) .

Kaohsiung County: 2♀ , Taoyuan District, Tengihih National Forest Recreation Area , 23.06, 120.75, 12–13 May 1989, S. Gotoh, 1♀ with USIs ( AMNH _PBI 00380488) ( TYCN) .


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Eurystylopsis crassicornis (Poppius)

Yasunaga, Tomohide, Nakatani, Yukinobu & Chérot, Frédéric 2017

Eurystylomorpha crassicornis

Zheng 2004: 263
Kerzhner 1999: 98
Schuh 1995: 765
Poppius 1915: 17