Eurystylus jingfui Yasunaga, Nakatani & Chérot

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 combinatio, Zootaxa 4227 (3), pp. 301-324: 308-311

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Eurystylus jingfui Yasunaga, Nakatani & Chérot

n. sp.

Eurystylus jingfui Yasunaga, Nakatani & Chérot  , n. sp.

Figs. 1View FIGURE 1 A, 3H –K, 4J –K, 5H, Table 1

Diagnosis. Recognized readily by its almost entirely fuscous body; golden vestiture on dorsum; pronotum lacking a pair of dark spots; rather conventional mirine shape of parameres ( Fig. 4View FIGURE 4 K); and simple, largely membranous endosoma, only with a primary lobal-sclerite ( Fig. 5View FIGURE 5 H). Externally most similar to E. costalis Stål  ( Fig. 2View FIGURE 2 F) widely known from continental China, the Oriental Region and Pacific islands; distinguished by its mostly blackish dorsum, shorter labium not exceeding mesocoxa, and simple, largely membranous endosoma.

Description. Male ( Fig. 3View FIGURE 3 H –I): Body almost entirely fuscous, tumid; dorsum weakly shining, with black and golden vestiture ( Fig. 1View FIGURE 1 A, but vestiture easily rubbed off during collecting and mounting as in Fig. 3View FIGURE 3 H, J). Head black; vertex with small, pale spot adjacent to eye; frons with fuscous, velvety spot at base of antennal tubercle. Antenna largely blackish brown, with several pale or whitish parts; basal half of segment II dark reddish brown, with extreme base creamy white; bases of segments III and IV narrowly pale. Labium blackish brown, rather short, not exceeding base of mesocoxa; basal part of segment IV slightly pale. Pronotum weakly shining, with uniformly distributed, black, reclining setae and scattered golden or silvery pubescence (often missing in dry-preserved specimens); collar distinctly demarcated by deep groove especially on lateral sides, with ventral part whitish yellow; scutellum black, with pair of small pale spots near apex; thoracic pleurites dull black, pruinosed, with uniformly distributed, partly bundled, silvery setae except for ventral parts ( Fig. 3View FIGURE 3 I, K); margins of propleuron, mesoepisternum and metapleuron, and ventral 1/3 of epimeron whitish yellow; scent efferent system creamy white ( Fig. 3View FIGURE 3 I, K). Hemelytron almost entirely black, with uniformly distributed, dark, simple setae and scattered, golden pubescence; embolium with narrow, pale stripe along lateral margin; cuneus with pale, small spot laterally; membrane pale grayish brown, semitransparent, infuscate posteriad, with clearly fuscous veins. Coxae and legs almost uniformly black; each coxa with pale stripe on outer side; meso- and metatibiae often tinged with red in fresh specimen ( Fig. 1View FIGURE 1 A), each with creamy mark or ring medially ( Fig. 3View FIGURE 3 H̄K). Abdomen entirely black, largely with silvery vestiture. Male genitalia ( Fig. 4View FIGURE 4 J, K; 5H): Parameres of rather conventional mirine shape; hypophysis of left paramere moderately expanded; right paramere nearly straight. Endosoma largely membranous, with a single lobal-sclerite (PL). Female ( Fig. 3View FIGURE 3 J –K): As in male. Female genitalia: Not examined.

Measurements. ♂ / ♀: Total body length 5.8–7.0/ 7.0̄7.1; width of head across eyes 1.12̄1.20/ 1.20̄1.29; width of vertex 0.48̄0.49/ 0.56̄0.57; lengths of antennal segments ĪIV 1.19̄1.44, 2.50̄2.78, 0.69̄0.80, 0.54̄0.66/ 1.45̄1.52, 2.66̄2.74, 0.82̄0.84, 0.62̄0.63; length of labium 1.69̄2.12/ 2.14̄2.16; mesal length of pronotum including collar 0.96̄0.98/ 0.85̄1.03; basal width of pronotum 2.22̄2.36/ 2.48̄2.61; maximum width across hemelytron 2.37̄2.57/ 2.74̄3.02; and length of metafemur, tibia and tarsus 2.76̄2.88, 3.20̄3.44, 0.68̄0.72/ 3.01̄3.04, 3.56̄3.59, 0.68̄0.72.

Etymology. Named after Dr. Jing-Fu Tsai, our colleague and a promising Taiwanese heteropterist.

Biology. Adults of this new species were collected on inflorescences of Toxicodendron  sp. ( Table 1), but immature stages are yet to be confirmed.

Discussion. This new species is readily distinguished from other congeners by the characters mentioned in the key and diagnosis above. The first author collected an undetermined (possibly undescribed) species very similar to E. jingfui  from Indonesia (Sumatra), Peninsular Malaysia and Thailand; however, this SE Asian species is distinct in having the conspicuous, white striae on the lateral side of the body (thoracic pleura and proximal abdominal sterna). On the other hand, a male collected from subtropical plain in Nepal ( Fig. 1View FIGURE 1 A) is most probably conspecific with E. jingfui  . Because this specimen is unfortunately teneral and the male genitalia were invisible, we refrain from including its definitive record in the present work.

Holotype ♂: TAIWAN: Kaohsiung City, Maolin District, Shanping Forest Ecological Garden, 22°58'20"N 120°40'44"E, 17 Oct 2015, Y. Nakatani ( AMNH _PBI 00380474) ( TFRI)GoogleMaps  . Paratypes. TAIWAN: 1♂ 2♀, same data as for holotype ( NIAES, TFRI)GoogleMaps  ; 2♂ 1♀, same data, except for date 18 Oct 2015 ( NIAES, NMNS)GoogleMaps  ; 1♂ 1♀, Kaohsiung City, Liouguei District, Zhong-Xing-Long Li, near Mt. Taiyuanshan , 19 Oct 2015, H. Yoshitake ( NIAES, TYCN)  ; 5♂ 1♀, Taichung County, Kukuan , 730m, 20–22 Apr 1978, K.S. Lin & K.C. Chou ( NMNS)  ; 1♀, Nantou County, Chunyang , Malaise trap (KCN), 11 May – 13 Jul 2004, C.S. Lin & W.T. Wang ( NMNS)  ; 1♀, Nantou, Nanshanchi , 14 Apr (no further data, TYCN)  .


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Taiwan Fisheries Research Institute


National Institute for Agro-Environmental Sciences


National Museum of Natural Science