Stenoloba viridibasis Han & Kononenko, 2009

Han, H. L. & Kononenko, V. S., 2009, A review of the genus Stenoloba Staudinger, 1892 from China, with description of 6 new species and 7 new records for China (Lepidoptera: Noctuidae, Bryophilinae), Zootaxa 2268 (1), pp. 1-22 : 5-11

Stenoloba viridibasis Han & Kononenko sp. n.

( Figs. 3 , 19 )

Type material. Holotype; male, China, Prov. Yunnan, Jiangcheng , 15–17.ix.2008 (coll. H.L. Han & E Liu). The holotype is preserved in the collection of Northeast Forestry University, Harbin.

Diagnosis. The new species belongs to the S. manley group. It is much smaller compared to previous species. Externally it resembles S. manley manley , but can be easily distinguished by clear contrasting saladgreen mark in basal field. The male genitalia of the new species differ from S. manley by narrower apical part of valva and shape of distal part and the shape of aedeagus and vesica. Its closest congener is S. likianga ( Figs. 36, 38 ), however the new species differs by wing pattern and more wider valva with wider and shorter apical part of the valva.

Description. Adult ( Fig. 3 ). Wingspan 23 mm. Head and thorax brown-grey with greenish scales. Thorax grey with greenish; thoracic crest not expressed. Ground colour of forewing brown-grey with somewhat greenish tint, most conspicuous in costal field. Basal field grey with greenish tint with large salad-green mark bordered with dark liens in basal and partially in subbasal fields. Subbasal and antemedial lines more expressed in costal area; medial shadow diffused; postmedial line double, its outer border thin, diffused; subterminal line expressed by row of diffused blackish streaks, terminal line as row of broken streaks. Antemedial field somewhat darker than ground colour, claviform expressed as black diffused spot; orbicular indistinct; reniform wide, in inner part bordered with black, in central part with red or reddish scales; costal part of medial, subterminal and terminal fields with intensive ash-grey suffusion especially expressed in costal area; costal area darker in basal half, paler in outer part, with well expressed base of lines. Cilia brownishgrey. Hindwing dark greyish-brown, darker in outer area; discal spot traceable; cilia brownish, with pale yellowish inner line.

Male genitalia ( Fig. 19 ). Uncus developed, moderate, thin; tegumen and vinculum thin, tegumen 1.3 times higher than vinculum; juxta broadly rhomboidal, without apical extension; transtilla well developed, with sclerotized plates. Valva somewhat narrower and less massive than in S. manley and S. yunley ; with well developed costa, almost symmetrical, from base to mid costal margin somewhat convex, not parallel to ventral margin; in upper third constricted (less than in S. manley , with more wide “neck” and smaller distal part); distal part expanded, but less than in S. manley , apical part trapezoidal in shape, much wider than in S. likianga , with roundly abrupt apical margin and with well expressed apical and tornal angles, covered with field of strong setae; sacculus long, bulged, clasper as a longitudinal plate. The structure of aedeagus is similar to S. likianga Kononenko & Ronkay, 2000 . Aedeagus relatively short, smaller than in S. manley , strongly tapering in basal third; vesica broadly tubular, much broader than in S. likianga , bearing single cornutus, larger than in S. manley and S. likianga , but smaller than in S. yunley . Female unknown.

Etymology. The species name “ viridibasis ” indicates a characteristic feature of the wing pattern – the prominent salad-green mark in the basal field of the forewing.

Distribution. The species is known only from its type-locality, Prov. Yunnan, South China.

Figures

FIGURES 1–8. Stenoloba spp., adults. 1. S. yunley, male, holotype; 2. S. yunley, male, paratype; 3. S. viridibasis, male, holotype; 4. S. pulla, male; 5. S. oculatoides, male, holotype; 6. S. benedeki, male; 7. S. viridinivea, male, holotype; 8. S. viridinivea, male, paratype.

FIGURES 18–23. Stenoloba spp., male genitalia. 18. S. yunley, paratype, genit. prep. HHL-1331-1; 19. S. viridibasis, holotype, genit. prep. HHL-1335-1; 20. S. manley, South Korea; 21 S. pulla, genit prep. HHL-1243-1; 22. S. oculatoides, holotype, genit. prep. AZS-HHL-163; 23. S. oculata, genit. prep. HHL-518-1.

FIGURES 35–38. Stenoloba spp., adults and male genitalia. 35. S. lanceola, adult; 36. S. yunnana. 37. S. lanceola, male genitalia, genit. prep. ASZ-116-1. 38. S. yunnana, male genitalia, genit. prep. HHL-1349-1