Cysteochila abundantis Drake & Poor, 1937

Souma, Jun & Ishikawa, Tadashi, 2022, Taxonomic review of the tingine genera Cysteochila, Hurdchila, Physatocheila, and Xynotingis from Japan, with description of a new genus (Hemiptera: Heteroptera: Tingidae), Zootaxa 5150 (1), pp. 1-42 : 4-6

Cysteochila abundantis Drake & Poor, 1937

( Figs. 1A–E , 2A , 17A , 18A )

Cysteochila abundantis Drake & Poor, 1937a: 8 . Holotype: macropterous ♂, Philippines: Mindanao , Bukidnon Province, Tangkulan; USNM.

Cysteochila abundantis: Drake & Poor (1937b: 400) (distribution).

Cysteochila abundans [incorrect subsequent spelling]: Drake & Ruhoff (1965a: 164) (catalog).

Specimens examined. Non-types (165 ♂♂ 182 ♀♀ 1 terminalia missing), JAPAN: Ryukyu Islands: Okinawa Islands : Okinawa Is. , Arakawa , 5.iii.1964, leg. Y. Miyatake (1 ♂, KUM) ; Okinawa Is., Izumi , 21.x.1963, leg. S. Uéno (1 ♀, KUM) ; Okinawa Isls., Okinawajima, Ginowan-shi , Kakazu-takadai-kôen, 20.ii.2021, leg. H. Yoshitake (1 ♂, NIAES) . Miyako Islands: Miyako Is., Karimata , 19.x.1963, leg. S. Uéno (6 ♂♂ 6 ♀♀, KUM) ; Miyako Is., Hirara, Higashi-sokobaru, Nettai-shokubutuen , 2.xi.1999, leg. T. Ishikawa (6 ♂♂ 11 ♀♀, TUA) ; Miyakojima Is., Ueno, Mt. Nobarudake , 27.xii.2017, leg. H. Yoshitake (7 ♂♂ 3 ♀♀, TUA) ; as above but 29.xii.2017 (1 ♀, TUA) ; as above but leg. H. Kojima (9 ♂♂ 13 ♀♀, TUA) ; as above but 11.x.1993, leg. M. Hayashi (2 ♂♂, TUA) ; as above but 9.xi.2018, leg. J. Souma (5 ♂♂ 4 ♀♀, TUA) ; Miyakojima Is., Hirara, Shimajiri , 28.xii.2017, leg. H. Yoshitake (4 ♂♂ 2 ♀♀, TUA) ; Miyakojima Is., Hirara, Ôno-sanrin , near Miyako-seisyônen-no-ie, 29.xii.2017, leg. H. Yoshitake (7 ♂♂ 4 ♀♀, TUA) ; as above but 21.xi.1992, leg. M. Hayashi (3 ♂♂, TUA) ; as above but 7.xi.2018, leg. J. Souma (32 ♂♂ 46 ♀♀ 1 terminalia missing, TUA) ; as above but 9.xi.2018, leg. J. Souma (26 ♂♂ 36 ♀♀, TUA) ; Miyakojima Is., Maehama Beach , 28.xii.2017, leg. H. Kojima (1 ♂, TUA) ; Miyako Is., Tomori, Amai , 10.vi.2009, leg. M. Hayashi (1 ♀, TUA) ; Miyako Is., Hirara, Higashinakasonezoe , 24.vi.2008, leg. M. Hayashi (2 ♂♂ 2 ♀♀, TUA) ; Miyako Is., Hirara, Karimata , 22.xi.1992, leg. M. Hayashi (1 ♂ 1 ♀, TUA) ; Miyako Isls., Miyako Is., Gusukube, Yoshino , 2444'07.9" N 12526 '56.7"E, 8.xi.2018, leg. J. Souma (6 ♂♂ 4 ♀♀, TUA) ; Miyakojima-shi, Hirara , Ôgamijima Is., 27.xii.2017, leg. H. Yoshitake (6 ♂♂ 9 ♀♀, TUA) ; as above but leg. H. Kojima (1 ♂ 1 ♀, TUA) ; Miyako Isls., Miyakojima-shi, Shimoji , Kurimajima Is., Tako-kôen , 1.x.2020, leg. H. Yoshitake (1 ♂, NIAES) ; Irabujima Is., Makiyama , 30.xii.2017, leg. H. Kojima (3 ♂♂ 1 ♀, TUA) ; as above but 10.xi.2018, leg. J. Souma (30 ♂♂ 24 ♀♀, TUA) ; Irabu Is., Irabu , 2448'36.6" N 12513 '06.8"E, 10.xi.2018, leg. J. Souma (1 ♀, TUA) ; Miyako Isls., Irabujima Is., near Makiyama-tenbôdai , 26.ix.2020, leg. H. Yoshitake (1 ♀, NIAES) . Yaeyama Islands: Ishigaki Is., Yoshihara , 15.x.1963, leg. K. Morimoto (1 ♂ 1 ♀, KUM) ; Ishigaki Is., Yonehara , 15.iii.1964, leg. Y. Miyatake (1 ♂, KUM) ; Ishigaki Is., Tôro-gawa , 17.iii.1964, leg. Y. Miyatake (1 ♂ 1 ♀, KUM) ; Ishigaki-jima, Yonehara-Hoshino , 27.viii.1958, leg. T. Hidaka (1 ♂, ELKU) ; Ishigaki-jima, Kaara-yama , 14.iii.1964, leg. Y. Miyatake (1 ♀, NSMT) ; Ishigaki Is. , v.1995, leg. M. Takai (1 ♀, NSMT) ; Iriomote Is., Haemida , 28.iii.1991, leg. M. Hayashi et al. (1 ♂ 1 ♀, NSMT) ; Yonaguni Is., Sonai , 8.x.1993, leg. M. Hayashi et al. (1 ♀, TUA) . A single specimen deposited in ELKU is labeled “ Cysteochila hidakai Takeya, 1962 ” (manuscript name).

Diagnosis. Recognized among other species of Cysteochila by a combination of the following characters: general color ashen ( Fig. 1A–E ); median spine on head reaching level far remote from bases of frontal spines; rostrum reaching posterior margin of mesosternum; lateral carinae of pronotum nearly parallel to each other in anterior part, concealed by paranotum in anterior part; paranotum incompletely covering pronotal disc in anterior part, not touching each other, not concealing median carina of pronotum, widened posteriorly; outer margin of paranotum gently curved outward in its entire length; anterior margin of hemelytron nearly straight in its entire length; costal area narrower than subcostal area at widest part, with a single row of areolae in its entire length; and subcostal area with 2 rows of areolae in its entire length.

Description of genitalia. Pygophore ( Figs. 1D , 17A ) compressed dorsoventrally, hexagonal in ventral view, strongly concave at anterior margin of dorsum, smooth on surface, irregularly punctate in middle part of dorsum. Paramere ( Fig. 18A ) expanded in middle part, curved inward in apical part; outer and inner margins covered with pubescence in middle part. Female terminalia ( Fig. 1E ) pentagonal in ventral view, covered with pubescence.

Remarks. The above-recorded specimens match well with the photographs of the holotype (http://n 2t.net/ ark:/65665/3bd050830-c134-4d8d-adae-4bbe5d36e029) and the original description ( Drake & Poor 1937a) of C. abundantis described from the Philippines.

Cysteochila abundantis closely resembles C. tingoides in the shape of the pronotum but can be easily distinguished from it by the following characteristics: rostrum reaching posterior margin of mesosternum ( Fig. 1C ); anterior margin of hemelytron nearly straight in its entire length ( Fig. 1A ); and costal area with a single row of areolae in its entire length. In contrast, C. tingoides presents the following characteristics: rostrum reaching middle part of mesosternum ( Fig. 3C ); anterior margin of hemelytron nearly straight in basal half and curved inward in apical half ( Fig. 3A ); and costal area with 2 rows of areolae in basal part and a single row in remaining parts.

Distribution. Japan (Ryukyu Islands: Okinawa Island, Miyako Island, Ogami Island, Kurima Island, Irabu Island, Ishigaki Island, Iriomote Island, Yonaguni Island), Philippines (Mindanao Island, Luzon Island).

Cysteochila abundantis is here recorded from Japan for the first time. The discovery of C. abundantis from the Okinawa Island represents the northernmost distributional record of this species.

Host plant. Masami Hayashi, Hiroaki Kojima, and the first author of the present paper have confirmed Antidesma pentandrum (Blanco) Merr. (Euphorbiaceae) , Calophyllum inophyllum L. ( Clusiaceae ), Cinnamomum yabunikkei H.Ohba (Lauraceae) ( Fig. 2B ), and Toddalia asiatica (L.) Lam. ( Rutaceae ) ( Fig. 2C ) as the host plants of C. abundantis .

Biology. A number of C. abundantis individuals were collected from the leaves of the above-mentioned host plants in four botanical families, suggesting that this species is folivorous, similar to many other tingids ( Schuh & Weirauch 2020) and euryphagous.

In Japan, adults were observed in almost all seasons (present study).

Figures

FIGURE 1. Habitus images of Cysteochila abundantis from Japan. Dried specimen, dorsal and lateral views (A, B). Ventral structures: rostrum (C), male terminalia (D) and female terminalia (E). Scale bars: A, B, 1.0 mm; C–E, 0.2 mm.

FIGURE 2. A living adult (A) of Cysteochila abundantis from Ishigaki Island, the Ryukyu Islands, Japan (photographed indoors). Host plant (B, Cinnamomum yabunikkei H.Ohba; C, Toddalia asiatica (L.) Lam.) of C. abundantis on Miyako Island, the Ryukyu Islands, Japan.

FIGURE 3. Habitus images of Cysteochila tingoides from Vietnam. Dried specimen, dorsal and lateral views (A, B). Ventral structures: rostrum (C) and male terminalia (D). Scale bars: A, B, 1.0 mm; C, D, 0.2 mm.

FIGURE 17. Pygophores of eleven species of Cysteochila and its close relatives from Japan, dorsal view: C. abundantis (A); Limnostatua lewisi comb. nov. (B); Physatocheila chiniana comb. nov. (C); P. consueta comb. nov. (D); P. distinguenda (E); P. euthenia comb. nov. (F); P. fieberi from Japan proper (G); P. fieberi from the Ryukyu Islands (H); P. miyatakei (I); P. nigrintegerrima (J); P. orientis (K); P. veteris (L). Scale bars: 0.1 mm.

FIGURE 18. Parameres of eleven species of Cysteochila and its close relatives from Japan, dorsal view: C. abundantis (A); Limnostatua lewisi comb. nov. (B); Physatocheila chiniana comb. nov. (C); P. consueta comb. nov. (D); P. distinguenda (E); P. euthenia comb. nov. (F); P. fieberi from Japan proper (G); P. fieberi from the Ryukyu Islands (H); P. miyatakei (I); P. nigrintegerrima (J); P. orientis (K); P. veteris (L). Scale bars: 0.1 mm.