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 Author Yasunaga, Tomohide Author Nakatani, Yukinobu Author Chérot, Frédéric text Zootaxa 2017 4227 3 301 324 journal article 37230 10.11646/zootaxa.4227.3.1 d71680f0-0069-4290-a53e-9272043455fc 1175-5326 268312 62ABB516-62B1-46AF-A235-3AD772358A8A Eurystylus sauteri Poppius Figs 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 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 D, F, H); medially protruded sensory lobe of L-shaped right paramere ( Fig. 4 E, G, I); wholly spinulate primary lobe of endosoma ( Fig. 5 D–G); larger sclerotized ring ( Fig. 6 C); and narrower interramal lobe ( Fig. 6 D). Significant intraspecific variation recognized in general coloration ( Figs 1 E–F, 3A–D) and size ( Table 2 ). Final-instar nymph ( Fig. 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 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 D, F, H); right paramere L-shaped, medially with protruded sensory lobe ( Fig. 4 E, G, I); endosomal PL almost straight, wholly spinulate on dorsal side, terminated in a hook; TL narrowed, not much developed ( Fig. 5 D–G). Female : As in male and original description by Poppius (1915) . Female genitalia ( Fig. 6 C– D): Generally large in size; sclerotized ring thick-rimmed, ovoid ( Fig. 6 C); posterior wall with narrow interramal lobe and lanceolate dorsal structure ( Fig. 6 D). Measurements. See 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 ). 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 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 ) ; 2♂ 1♀ , same locality, 19 Oct. 2015 , Light Trap , H. Yoshitake ( NIAES ) ; 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 ) ; 1♀ , Taichung County , Wanfeng Hill , Malaise trap , Sep 1984 , K.S. Lin & K.C. Chou ( NMNS )