Euryobeidia ellipsoidea Xiang & Han, 2017

Han, Hongxiang, 2017, A review of Euryobeidia Fletcher, 1979 (Lepidoptera, Geometridae, Ennominae), with description of three new species, Zootaxa 4317 (2), pp. 370-378 : 372

Euryobeidia ellipsoidea Xiang & Han sp. nov.

Figs 4–5 , 16, 21, 26 , 31

Description. Head. Antenna filiform in both sexes. Frons dark grey, not protruding. Labial palpus short and stout, slightly extending beyond frons, dark grey; third segment not elongate in female. Vertex, tegula and patagia dark grey. Thorax. Dorsally white; two dark grey spots present, one on prothorax and another on metathorax. Hind tibia with two pairs of spurs in both sexes, not dilated and without hair-pencil in male. Forewing length: male 15–17 mm; female 18–19 mm. Outer margin of forewing arc-shaped slightly, that of hindwing rounded; both wings not elongate, with apex rounded. Wings white, covered with dark grey patches. Forewing scattered with lots of dark grey spots, and those spots distinctly contacted with each other and formed bands or patches on the base and inner margin; large terminal area tinged with dark grey band, with interior margin concaved twice, decorated with small pale yellow patches near outer margin; discal spot a large dark grey inverted triangular patch, extending to costa; fringes dark grey. Hindwing with some small dark grey patches at base; terminal area tinged with pale yellow, decorated with lots of small dark grey spots; anal margin scattered with lots of small dark grey spots, sometimes those spots contacted with each other and formed patches; postmedial line appearing as a row of dark grey spots, protruding outwards among M veins; discal spot an oval dot; terminal line appearing as a row of dark grey spots on veins; fringes pale yellow, dark grey on vein ends. Underside identical to upperside.

Abdomen. Abdomen with dorsal side pale yellow; a dark grey spot present at middle of each segment respectively. Third sternite of male abdomen without setal comb.

Male genitalia. Uncus short, broad basally, narrow and pointed apically; dorsal side bearing setae and an extremely developed oval process; gnathos weak; valva narrow and long, tapering and curved at apex, with a row of dense setae from base to apex, with a serrated sclerite basally, not as distinct as in languidata ; costa with apparent incrassation at middle; saccus rounded terminally; juxta weak, groove-like. Aedeagus narrow posteriorly and ending in a long pointed process, cornuti formed by two parts, one small process and one sclerotized patch on the vesica in similar size.

Female genitalia. Papillae analis short and oval. Apophyses anteriores short, about 1/3 length of apophyses posteriores; a triangular sclerite present between the base of apophyses posteriores. Lamella antevaginalis well developed, approximately dumbbell-shaped and with posterior margin serrated; lamella postvaginalis nearly quadrate-like, with posterior margin concave at middle. Ostium wide-open, ductus bursae sclerotized, scobinate inside; corpus bursae nearly oval, the upper part strongly sclerotized, the middle part bearing lots of spines inside, the bottom part membranous.

Diagnosis. The external characters of E. ellipsoidea are similar to those of E. languidata and E. incrassata . In E. ellipsoidea , the spots on basal and terminal area of the forewing are distinctly contacted with each other and formed a band or patches. In the male genitalia, the dorsal process of the uncus is ellipsoidal, and most developed among the three species; the middle process of the costa is less developed than in E. incrassata .

Type-material examined. Holotype, ♂ ( IZCAS), CHINA: Sichuan: Emeishan, Jiulaodong , 1800–1900 m, 28.VII.1957, coll. Huang Keren.

Paratypes: CHINA: Shaanxi ( IZCAS): 1♂, Ningshan, Huoditang, 1580 m, 16.VIII.1998, coll. Yuan Decheng ; 1♂, Zhouzhi, Houzhenzi, 1300 m, 19.VIII.2007, coll. Li Wenzhu. Gansu ( IZCAS): 2♂, Wenxian, Liziba, 1971 m, 22–24.VIII.2014, coll. Pan Xiaodan . Sichuan ( IZCAS): 1♂, same data as holotype ; 6♂2♀, Emeishan, 6.VIII.1977, 6.VIII.1978; [1977](one male); 1♀, Tien-Tsuen, Yuin-Kin, 1899, Chasseurs indigènes, ex coll. Wehrli (ZFMK).

Distribution. China (Shaanxi, Gansu, Sichuan).

Etymology. This species name is from the shape of the developed dorsal process of the uncus in male genitalia.

Figures

FIGURES 1 – 14. Adults. 1 – 2. Euryobeidia languidata. 1, male (Fujian); 2, female (Fujian); 3. E. languidata yakushimensis, male (holotype, Yakushima, BMNH); 4 – 5. E. ellipsoidea sp. nov. 4, male (holotype, Sichuan); 5, female (Sichuan); 6. E. incrassata sp. nov. male (holotype, Hainan); 7 – 10 E. largeteaui. 7, male (Zhejiang); 8, ditto, underside; 9, female (Zhejiang); 10, ditto, underside; 11 – 14. E. quadrata sp. nov. 11, male (holotype, Zhejiang); 12, ditto, underside; 13, female (Zhejiang); 14, ditto, underside; Scale bar = 1 cm.

FIGURES 15 – 29. Male genitalia. 15, Euryobeidia languidata (Fujian); 16, E. ellipsoidea sp. nov. (paratype, Sichuan); 17, E. incrassata sp. nov. (paratype, Hainan); 18, E. largeteaui (Guangxi); 19, E. quadrata sp. nov. (paratype, Zhejiang); 20 – 24. Aedeagus. 20, E. languidata; 21, E. ellipsoidea sp. nov. (paratype); 22, E. incrassata sp. nov. (paratype); 23, E. largeteaui; 24, E. quadrata sp. nov. (paratype); 25 – 29. Lateral view of uncus. 25, E. languidata; 26, E. ellipsoidea sp. nov. (paratype); 27, E. incrassata sp. nov. (paratype); 28, E. largeteaui; 29, E. quadrata sp. nov. (paratype). Scale bars = 1 mm.

FIGURES 30 – 33. Female genitalia. 30, Euryobeidia languidata (Fujian); 31, E. ellipsoidea sp. nov. (paratype, Sichuan); 32, E. largeteaui (Hunan); 33, E. quadrata sp. nov. (paratype, Zhejiang). Scale bars = 1 mm.