Jankowskia curva, Jiang, Nan, Xue, Dayong & Han, Hongxiang, 2010

Jiang, Nan, Xue, Dayong & Han, Hongxiang, 2010, A review of Jankowskia Oberthür, 1884, with descriptions of four new species (Lepidoptera: Geometridae, Ennominae), Zootaxa 2559, pp. 1-16 : 7

Jankowskia curva sp. nov.

Figs. 9–10 , 26 , 34

Description. Head: Antenna bipectinate in male, the longest pectination about four times diameter of antennal shaft, filiform at tip. Frons yellowish brown suffused with sparse grey scales, smooth-scaled. Labial palpus greyish brown, short and stout, extending slightly beyond frons. Vertex greyish brown.

Thorax: Dorsal side blackish brown. Hind tibia in male without hair-pencil. Forewing length: male 23 mm. Wings blackish brown. Forewing with outer margin almost oblique; costa diffused with short longitudinal greyish brown flecks; antemedial line black, slightly protruded inwards below cell; medial line black, distinct; postmedial line black, protruded outwards between M1 and M2, inwards below M2, then paralleling to medial line; both postmedial and medial lines broadened below M3; a yellowish brown patch outside postmedial line, the dull brown shadow in the middle of the patch indistinct; discal spot black, striplike, indistinct. Hindwing with basal area blackish brown; medial line black, indistinct, equal to postmedial line in width; postmedial line black, protruded outwards between M1 and M3 then strongly bent inwards below M3, thickened near anal margin; a yellowish brown patch outside postmedial line, the dull brown shadow in the middle of the patch more distinct than on forewing. Underside greyish black, transverse lines on hindwing more distinct than on forewing.

Venation: Male forewing: R1 and R2 separate, almost parallel in male; R3–5 and M1 diverging from anterior angle of cell.

Abdomen: First abdominal segment with pale grey band dorsally, remaining segments blackish brown.

Male genitalia: Uncus triangular, length about equal to basal width. Posterior processes of tegumen triangular, very short, about one-ninth length of uncus, without long setae apically. Gnathos with median process round, about half length of basal width. Valva even in width; blunt terminally, bearing a large area of long setae; one cluster of long setae near center, extending dorsally; ventral margin of valva not protruded outwards at middle. Saccus small, round. Juxta asymmetrical, left sclerotized process hook-like, long and slender, about half length of juxta. Spines bundle of cornuti about half length of aedeagus.

Female genitalia: unknown.

Diagnosis. This new species is similar to J. fuscaria in the wing shape and markings, but it can be distinguished from that species by the following differences: the forewing postmedial line is more strongly protruded outwards between M1 and M2, broadened below M3. In the male genitalia, the tegumen posterior processes are triangular, not digitiform, much shorter, without long setae apically; the valva is even in width, not broadened terminally, the ventral margin of the valva is not protruded outwards at middle; the left process of juxta is hook-like, which is triangular in J. fuscaria ; the spines bundle of cornuti is much longer, about half length of the aedeagus.

Material examined. Holotype, 3, CHINA: Henan: Songxian Baiyunshan, 21.VI.2001, coll. Shen Xiaocheng ( IZCAS). Paratypes: 13 ( IZCAS), Shaanxi: Ningshan Huoditang, 1500–2000 m, 8.VII.2008, coll. Liu Wangang; 13 ( IZCAS), Shaanxi: Zhouzhixian Houzhenzi, 1276 m, 1.VII.2008, coll. Li Wenzhu.

Etymology. The specific name is form the Latin word curvus, which means curvy.

Distribution. China (Henan, Shaanxi).

Figures

FIGURES 1 – 18. Adults of Jankowskia. 1 – 2. J. athleta. 1, male, upperside; 2, male, underside; 3 – 4. J. taiwanensis. 3, male, upperside; 4, male, underside; 5 – 8. J. fuscaria fuscaria. 5, male, upperside; 6, male, underside; 7, female, upperside; 8, female, underside; 9 – 10. J. curva sp. nov., holotype. 9, male, upperside; 10, male, underside; 11 – 12. J. acuta sp. nov., holotype. 11, male, upperside; 12, male, underside. 13 – 14. J. improjecta sp. nov., holotype. 13, male, upperside; 14, male, underside; 15 – 18. J. bituminaria raddensis. 15. male, upperside; 16, male, underside; 17, female, upperside; 18, female, underside. Scale bar = 1 cm.

FIGURES 23 – 30. Male genitalia of Jankowskia. 23, J. athleta; 24, J. taiwanensis; 25, J. fuscaria fuscaria; 26, J. curva sp. nov.; 27, J. acuta sp. nov.; 28, J. improjecta sp. nov.; 29, J. bituminaria raddensis; 30, J. obtusangula sp. nov. Scale bar = 1 mm.

FIGURES 31 – 38. Aedeagus of Jankowskia. 31, J. athleta; 32, J. taiwanensis; 33, J. fuscaria fuscaria; 34, J. curva sp. nov.; 35, J. acuta sp. nov.; 36, J. improjecta sp. nov.; 37, J. bituminaria raddensis; 38, J. obtusangula sp. nov. Scale bar = 1 mm.