Eurystylus sauteri Poppius

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 : 317-318

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Eurystylus sauteri Poppius


Eurystylus sauteri Poppius

Figs 1 View FIGURE 1 D–H, 2C, 3A–D, 4D–I, 5D–G, 6C–D, 7, 8C, Tables 1–2

Eurystylus sauteri Poppius, 1915: 15 (n. sp., TAIWAN: Kosempo; images of the holotype as in Fig. 7 View FIGURE 7 A); Kawasawa & Kawamura, 1975: 162, fig. 129 (diag.); Schuh, 1995: 769 (cat.); Kerzhner & Josifov, 1999: 100 (cat.); Zheng et al., 2004: 277 (diag.); Schuh (2002–2014) online catalog.

Eurystylus luteus: Yasunaga et al., 1999: 6 (list); Yasunaga, 2001: 233 (not Hsiao, 1941). Eurystylus sp. Yasunaga et al., 1993: 158 (diag.).

Diagnosis. General coloration and external morphology as in E. ryukyus , from which E. sauteri can be distinguished by the following characters: Pale or creamy white base of antennal segment III; obscure, elongate ovoid paired spots on pronotum (spots obliterated in some individuals); strongly and sharply expanded hypophysis of left paramere ( Fig. 4 View FIGURE 4 D, F, H); medially protruded sensory lobe of L-shaped right paramere ( Fig. 4 View FIGURE 4 E, G, I); wholly spinulate primary lobe of endosoma ( Fig. 5 View FIGURE 5 D–G); larger sclerotized ring ( Fig. 6 View FIGURE 6 C); and narrower interramal lobe ( Fig. 6 View FIGURE 6 D). Significant intraspecific variation recognized in general coloration ( Figs 1 View FIGURE 1 E–F, 3A–D) and size ( Table 2 View TABLE 2 ). Final-instar nymph ( Fig. 2 View FIGURE 2 C) recognized by its pale brown body largely mottled with reddish spots; reddish brown apical half of antennal segment II; largely reddish brown pronotum with a pair of small, obscured ocellate spots; and a few pairs of ocellate spots on abdominal sterna.

Description. Male: Body generally yellow or grayish brown, sometimes largely darkened; dorsal surface matte, mottled with pale or grayish brown spots, with three types of vestiture similar to E. ryukyus . Head yellowish, grayish or dark brown, with clear fuscous, velvety spot on anterolateral margin of frons. Antenna dark brown; segments I and basal half of segment II reddish brown; bases of segments II, III and IV white. Labium pale brown, reaching but not exceeding apex of mesocoxa; segments III and IV shiny chocolate brown. Paired spots on pronotal disk obscured, narrowed, or sometimes obliterated; posterior inner margin of each callus narrowly infuscate; scutellum usually darkened medially and/or apically; pleura grayish to dark brown, matte, with uniformly distributed, silvery, scalelike setae; scent efferent system pale grayish brown. Hemelytron yellowish brown, grayish brown or largely darkened; cuneus dark brown, narrowly yellow-orange at middle; membrane pale smoky brown, narrowly semitransparent at middle, with fuscous veins. Coxae and legs pale grayish or yellowish brown; each coxa partly darkened; all femora usually dark brown, mottled with minute pale spots; base of each femur more or less pale; subapical part of metafemur usually with a pale ring or annulation; all tibiae brown or dark brown, sometimes tinged with red; each tibiae usually with a pale ring at middle. Abdomen grayish brown or darker, with small dark spots at spiracles, with uniformly distributed, silvery, short, reclining setae. Male genitalia ( Figs. 4 View FIGURE 4 D–I, 5D–G): Parameres large in size; left paramere C-shaped, with noticeably expanded hypophysis (extent of width somewhat varying as in Fig. 4 View FIGURE 4 D, F, H); right paramere L-shaped, medially with protruded sensory lobe ( Fig. 4 View FIGURE 4 E, G, I); endosomal PL almost straight, wholly spinulate on dorsal side, terminated in a hook; TL narrowed, not much developed ( Fig. 5 View FIGURE 5 D–G). Female: As in male and original description by Poppius (1915). Female genitalia ( Fig. 6 View FIGURE 6 C– D): Generally large in size; sclerotized ring thick-rimmed, ovoid ( Fig. 6 View FIGURE 6 C); posterior wall with narrow interramal lobe and lanceolate dorsal structure ( Fig. 6 View FIGURE 6 D).

Measurements. See Table 2 View TABLE 2 .

Biology. This species predominantly inhabits warm temperate zones and is associated with various inflorescences of dicot angiosperms ( Table 1). The immature forms have been found from those of six plant families. A bivoltine life cycle is assumed, based on available collection data. In southwestern Japan, the adults appear in June and are almost continuously collected until late October.

Discussion. Kawasawa & Kawamura (1975) first reported E. sauteri from Japan (Shikoku and Kyushu). Subsequently, Miyamoto & Yasunaga (1989) considered E. sauteri was restricted to Ryukyus and Taiwan [species (x) in Discussion of E. ryukyus above], and Yasunaga et al. (1999) assigned the species occurring in Honshu, Shikoku and Kyushu [species (y)] to E. luteus Hsiao. As mentioned above, there is a strong likelihood that E. luteus and E. sauteri are conspecific, based on available evidence. We recognize the appropriate treatment of Kawasawa & Kawamura (1975), using the name sauteri for the species (y).

Within the Ryukyus , E. sauteri is yet to be confirmed but E. ryukyus is abundant. These two species coexist in Taiwan and southernmost parts of Kyushu and Shikoku ( Fig. 7 View FIGURE 7 ). We currently cannot elucidate why E. sauteri does not inhabit the subtropical islands. Incidentally, three female specimens from Shan District of N. Myanmar (TYCN) most probably represent E. sauteri , which is now assumed to widespread over eastern Asia.

Material examined. Holotype Ƌ, TAIWAN: Kaohsiung City, Kosempo [= current Kahsian , 23.07, 120.60], 7 Sep 1909, H. Sauter (without USIs, image examined, Fig. 8 View FIGURE 8 C). Additional material. More than 150 specimens ( CNC, NIAES, TYCN) collected between Jun 5 and Oct 16 from the following localities . JAPAN: Honshu: Shizuoka Pref. , Atami City ; Wakayama Pref., Shirahama Town, Katsuragi Town, Nachi Katsu’ura Town & Tanabe City— 1♂ from Tanabe City ( Yasukawa Valley ) with USIs ( AMNH _PBI 00380482) ; Hyogo Pref., Inagawa, Izushi. Shikoku : Ehime Pref., Omogo . Kochi Pref., Kami City , Kochi City , Nankoku City , Sukumo City & Tsuno Town (Tengu Plateau). Kyushu : Fukuoka Pref. , Fukuoka City (Aburayama & Nokonoshima Island) ; Miyazaki Pref. , Miyazaki City (Sadobaru) ; Nagasaki Pref. , Isahaya City ( Mt. Gokahara ) , Nagasaki City (Kabashima Island, Nameshi, Nishiumi & Taira) , Saikai City (Seihi Town, Nagasaki Biopark), Tsushima Island (Kechi) & Unzen City ( Azuma Town ) 1♂ from Unzen City, Azuma (32.81, 130.25) with USIs. ( AMNH _PBI 00380481) ; Oita Pref., Shonai. TAIWAN: 2♂ 1♀ , Nantou County, Puli, Shizitou (23.99, 121.03), 15–18 May 1989, S. Gotoh ( TYCN), 1♂ with USIs ( AMNH _PBI 00380483) ; 1♀, Nantou, Yuchi, TFRI Lienhuachi Research Center , 29–30 Jun 2015, H. Yoshitake ( NIAES) ; 1♂ 2♀, Nantou, Ren-ai, Mt. Kuantaoshan , 1 Jul 2015, H. Yoshitake ( NIAES) ; 2♀, Nantou, Hweishun , 20 Feb 1990, C.S. Tsung, light trap ( NMNS) ; 1♂, Nantou, Jenai, Chunyang , mercury light, 10–12 Aug 1998, C.S. Lin & W.T. Yang ( NMNS) ; 1♀, Ilan County, Fushan Botanical Garden , 27–28 Jun 2015, H. Yoshitake ( NIAES) ; 1♀, Fushan , mercury light, 9 Jun 2004, W.T. Yang ( NMNS) ; 3♂ 2♀, Kaohsiung County, Maolin District, Shanping Forest Ecological Garden, 22°58'20"N 120°40'44"E, 16–17 Oct 2015, Y. Nakatani ( NIAES) GoogleMaps ; 2♂ 1♀, same locality, 19 Oct. 2015, Light Trap, H. Yoshitake ( NIAES) GoogleMaps ; 4♂ 4♀, Kaohsiung County, Liouguei District, Zhong-Xing-Long Li, near Mt. Taiyuanshan , 22°59'22"N 120°40'44"E, 19 Oct. 2015, H. Yoshitake, Y. Nakatani ( NIAES) GoogleMaps ; 1♀, Taichung County, Wanfeng Hill , Malaise trap, Sep 1984, K.S. Lin & K.C. Chou ( NMNS)


Canadian National Collection of Insects, Arachnids, and Nematodes


National Institute for Agro-Environmental Sciences


American Museum of Natural History


Taiwan Fisheries Research Institute


National Museum of Natural Science














Eurystylus sauteri Poppius

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

Eurystylus luteus: Yasunaga et al., 1999 : 6

Yasunaga 2001: 233
Yasunaga 1999: 6
Yasunaga 1993: 158

Eurystylus sauteri

Zheng 2004: 277
Kerzhner 1999: 100
Schuh 1995: 769
Kawasawa 1975: 162
Poppius 1915: 15