Rhodostrophia reisseri, Cui & Xue & Jiang, 2019

Cui, Le, Xue, Dayong & Jiang, Nan, 2019, Description of two new species of Rhodostrophia Hübner, 1823 from China (Lepidoptera, Geometridae), Zootaxa 4563 (2), pp. 337-353 : 341-343

Rhodostrophia reisseri sp. nov.

Figs 8 , 21 , 32 , 43 , 53 , 59

Description. Head. Antennae quadripectinate in male, pectination covered with cilia, apex filiform, flagellum of the antennae dentate ventrally (fig. 59), longest pectination about three times width of flagellum; filiform in female. Frons yellowish brown with reddish brown scales, protruding. Labial palpus yellowish brown, suffused with reddish scales ventrally. Vertex yellowish white. Thorax. Patagia, tegulae and dorsal side of thorax yellowish brown. Hind tibia in male with three spurs. Forewing length: male 17–19 mm; female 16–18 mm. Outer margin of forewing smooth, apex slightly pointed; hind wing with rounded apex, outer margin with a small protrusion at vein M 3. Wing colour deep yellowish brown on forewing and yellowish white on hind wing, sometimes yellowish white on both wings, or with purple on forewing; transverse lines reddish brown or brown. Forewing with costa reddish brown or brown; antemedial line curved outwards below costa, then nearly straight; discal spot blackish brown and small; medial line slightly incurved on posterior half, sometimes companied with brown shadow outside; postmedial line wavy, scattered with red or brown shadow outside; terminal line blackish brown; fringes yellowish brown at base and the remaining reddish brown. Hind wing with discal spot paler than that of forewing; medial line, postmedial line, terminal line and fringes similar to those of forewing, but without shadow outside postmedial line. Underside with antemedial line and postmedial line indistinct; the remaining transverse lines similar to those of underside.

Male genitalia ( Figs 21 , 32 ). Uncus long, apex dilated and setose, about one third of uncus in length, and slight bifurcate on posterior margin. Gnathos triangular with long and acute apex. Costa sigmoid at apex, and setose terminally; sacculus separate from valva at apical one third, and forming a long and curved digitiform process. Juxta slender and plate-shaped. Saccus small rounded at apex. Aedeagus straight; vesica wrinkle and slightly sclerotized without cornutus. Eighth sternite weakly sclerotized with posterior margin concave centrally ( Fig. 53 ).

Female genitalia ( Fig. 43 ). Apophyses anteriores roughly about two fifths as long as apophyses posteriors. Surrounding of ostium sclerotized. Ductus bursae long, about as long as corpus bursae, membranous centrally, the remaining part strongly sclerotized. Ductus seminalis arising from the junction of ductus bursae and corpus bursae. Corpus bursae spherical; signum W-shaped with two vertical bars. Seventh sternite broad, concave on posterior margin, a pair of short curved pouch-like lateral processes arising from anterior margin.

Diagnosis. The new species can be distinguished by the combination of the following characters: the flagellum of the antennae is dentate ventrally; the male hind tibia has three spurs; the transverse lines of the wings are reddish to reddish brown; the medial line of the forewing is slightly incurved on the posterior half with dark shadow outside; the postmedial line is sinuous, and slightly suffused with reddish colour. The male genitalia are similar to R. philolaches , but the uncus is much broader on the basal half and is more dilated subapically; the process of the sacculus is longer than in R. philolaches . The female genitalia are also similar to those of R. philolaches , but the anterior half of the ductus bursae is more strongly sclerotized; the vertical bars of the signum is shorter than those in R. philolaches .

Material examined. Holotype, 6, CHINA: Yunnan ( ZFMK): Yunnan ( ZFMK): Lijiang , 27.VIII.1935, coll. H. Höne. Paratypes: 120 6 18♀ ( ZFMK), same locality and collector as holotype, 13.VIII–30.IX.1935; 2 6 1♀ ( IZCAS), Li-kiang, 4–14.IX.1935, coll. H. Höne (D. Stüning presented from ZFMK). Yunnan ( SMNK): 15♂ 3♀, Li-kiang, 22.VIII–14.IX.1935, coll. H. Höne (GU 6026, 162, 6025, 6024, 6022) .

Distribution. China (Yunnan).

Etymology. The species is dedicated to the well-known lepidopterist Hans Reisser (1896–1976, Vienna, Austria), who assembled a collection of more than 100,000 specimens during his lifetime and specialized early on Geometridae-Sterrhinae. At ZFMK he studied the Chinese Sterrhinae of the Höne-collection and discovered and named (but did not publish) the two new species described herein.

Remarks. The manuscript-name of the new species is " ellenae " Reisser in the collections of ZFMK and SMNK.

Figures

FIGURES 1–15. Adults of Rhodostrophia. 1–2. R. jacularia; 1. Male, Mongolia, 2. Female, Inner Mongolia, China; 3. R. grumaria, male, Tibet, China; 4. R. serraginaria, male, Xinjiang, China; 5. R. bicolor, male, Tibet, China; 6. R. yunnanaria, male, Yunnan, China; 7. R. similata, male, Yunnan, China; 8. R. reisseri sp. nov., male, holotype, Yunnan, China; 9. R. bisinuata bisinuata, female, Yunnan, China; 10. R. stueningi sp. nov., male, holotype, Yunnan, China; 11. R. philolaches, male, Yunnan, China; 12. R. tristrigalis, male, Sichuan, China; 13. R. anchotera, male, Yunnan, China; 14. R. olivacea, male, Yunnan, China; 15. R. pelloniaria, male, Tibet, China. Scale bar = 1 cm.

FIGURES 16–24. Male genitalia of Rhodostrophia. 16. R. jacularia, Inner Mongolia, China; 17. R. serraginaria, Xinjiang, China; 18. R. bicolor, Tibet, China; 19. R. yunnanaria, Sichuan, China; 20. R. similata, Gansu, China; 21. R. reisseri sp. nov., paratype, Yunnan, China; 22. R. bisinuata bisinuata, Yunnan, China; 23. R. stueningi sp. nov., paratype, Yunnan, China; 24. R. philolaches, Qinghai, China. Scale bar = 1 mm.

FIGURES 25–37. Male genitalia of Rhodostrophia. 25. R. tristrigalis, Tibet, China; 26. R. pelloniaria, Tibet, China. FIGURES 27–37. Aedeagus of Rhodostrophia. 27. R. jacularia, Inner Mongolia, China; 28. R. serraginaria, Xinjiang, China; 29. R. bicolor, Tibet, China; 30. R. yunnanaria, Sichuan, China; 31. R. similata, Gansu, China; 32. R. reisseri sp. nov., paratype, Yunnan, China; 33. R. bisinuata bisinuata, Yunnan, China; 34. R. stueningi sp. nov., paratype, Yunnan, China, the black lines show the cornutus and the line of small spurs on the terminal part of the aedeagus; 35. R. philolaches, Qinghai, China. 36. R. tristrigalis, Tibet, China; 37. R. pelloniaria, Tibet, China. Scale bar = 1 mm.

FIGURES 38–43. Female genitalia of Rhodostrophia. 38. R. jacularia, Inner Mongolia, China; 39. R. serraginaria, Xinjiang, China; 40. R. bicolor, Tibet, China; 41. R. yunnanaria, Yunnan, China; 42. R. similata, Yunnan, China; 43. R. reisseri sp. nov., paratype, Yunnan, China. Scale bar = 1 mm.

FIGURES 48–58. Male eighth sternite of Rhodostrophia. 48. R. jacularia; 49. R. serraginaria; 50. R. bicolor; 51. R. yunnanaria; 52. R. similata; 53. R. reisseri sp. nov.; 54. R. bisinuata bisinuata; 55. R. stueningi sp. nov.; 56. R. philolaches; 57. R. tristrigalis; 58. R. pelloniaria. Scale bar = 1 mm.

FIGURES 59–60. The antennal flagellum of Rhodostrophia. 59. R. reisseri sp. nov.; 60. R. stueningi sp. nov. Scale bar = 1 mm.