Euryobeidia incrassata 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 : 372-373

Euryobeidia incrassata Xiang & Han sp. nov.

Figs 6 , 17, 22, 27

Description. Head. Antenna filiform in male. Frons pale yellow, not protruding. Labial palpus pale yellow, slightly extending beyond frons. Vertex, tegula and patagia pale yellow; tegula with a black spot; patagia with a black spot basally, with a grey spot at middle. Thorax. Dorsal side white; two dark grey spots present on prothorax and metathorax. Hind tibia with two pairs of spurs, not dilated and without hair-pencil in male. Forewing length: male 23–25 mm; outer margin of forewing arc-shaped slightly, that of hindwing rounded; both wings not elongate, with apex rounded. Forewing white, covered with lots of dark grey spots, especially on wing base, costa and inner margin; antemedial line appearing as three dark grey spots on the anterior and posterior margins of cell and 2A respectively; postmedial line appearing as six dark grey spots on veins R, M1, M3, CuA1, CuA2 and 2A respectively, protruding outwards among M veins, the first two spots commonly mixed together; discal spot a large dark grey dot. Fringes dark grey. Hindwing white, tinged with dark grey and pale yellow terminally, yellow part mixed with short grey transverse streaks; postmedial line identical to forewing, but spots smaller; discal spot a small dark grey spot, or undiscernible. Terminal line appearing as a row of dark grey spots; fringes dark grey corresponding to those spots, pale yellow between veins. Underside identical to upperside.

Abdomen. Abdomen with dorsal side pale yellow; a dark grey spot present at middle of each segment respectively.

Male genitalia. Uncus hook-like, narrow and pointed apically, middle part in even width and bearing long setae; gnathos weak; valva narrow and long, concave at apex, with a row of dense setae from base to apex, with one serrated sclerite basally; costa with a strongly sclerotized and developed process at middle, the process trapezoidlike and serrated; saccus rounded terminally; juxta weak, groove-like. Aedeagus slender, cornuti with two narrow, joined sclerotized patches.

Female genitalia. Unknown.

Diagnosis. The external characters of E. incrassata are similar to those of E. languidata and E. ellipsoidea . However, in E. incrassata , the spots on the forewing are smaller and seldom contacted with each other, and the discal spot of the hindwing is much smaller or absent, as well as the spots on postmedial line. In the male genitalia, the uncus is hook-like, pointed apically and without dorsal process, and an apparent trapezoid-like sclerite is present at the middle of the costa.

Type-material examined. Holotype, ♂ ( IZCAS), CHINA: Hainan: Diaoluoshan , 8.V.1984, coll. Gu Maobin.

Paratypes: CHINA: Hainan ( IZCAS): 2♂, same data as holotype; 1♂, Baisha, Nankai, Nanmaola, 1261 m, 12–14.V.2009, coll. Chen Fuqiang.

Distribution. China (Hainan).

Etymology. This species name is derived from the character of costa in the 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.