Stenoloba acontioides, Han & Kononenko, 2018

Han, H. L. & Kononenko, V. S., 2018, Twelve new species and four new records of Stenoloba Staudinger 1892 from China (Lepidoptera, Noctuidae: Bryophilinae), Zootaxa 4388 (3), pp. 301-327 : 308

Stenoloba acontioides sp. n.

( Figs 12 , 49 )

Type material. Holotype: female, China, Prov. Yunnan, Simao, Beishan , 17.v.2013, H.L. Han & C. Zhang leg., slide HHL-6185-2, coll. NEFU.

Diagnosis. The species can be recognized by olive with whitish wing pattern on brown background. Externally this small species, resembles some species of the genus Acontia Ochsenheimer ( Noctuidae, Acontiinae ), however by the presence of the frontal protuberance and structure of female genitalia with long cup-like antrum the species undoubtedly belongs to the genus Stenoloba . The species has very characteristic unique appearance within the genus by its conspicuous forewing pattern. Because the male of the new species is unknown its species-groups affiliation is uncertain.

Description. Adult ( Fig. 12 ). Wingspan 23 mm. Head and thorax brown with olive-greenish scales, patagia bordered with greenish-brown; basal part of thoracic tuft reddish brown; abdomen grey. Forewing rather narrow, lanceolate; costal margin markedly arcuate, terminal margin convex, apex acute. Ground colour of forewing dark brown with pale whitish-olive suffusion, especially expressed in subbasal and medial fields; wing pattern represented by intensive pale suffusion bordered with thin light line; four distinct spots and whitish tinged with olive-green postmedial line. Basal field as dark brownish-black basal mark; subbasal field with intensive pale olive-whitish filing which is limited by distinct subcostal whitish spot and ventral brownish area bordered with thin whitish line; medial field brown with pale olive-whitish dusting and distinct orbicular and claviform encircled with thin brown line; reniform olive with brown and with whitish vertical nucleus on whitish background; postmedial line distinct, whitish, with two prominent white spots in ventral part; subterminal and terminal fields brownish, separated by thin indistinct whitish like; veins in subapical area dusted with whitish scales; terminal line dark brown, interrupted; cilia brownish, pale at base. Hindwing greyish brown, darker to terminal area, with indistinct discal spot; cilia pale yellowish with brown.

Male unknown.

Female genitalia ( Fig. 49 ). Ovipositor weak, moderate in length; apophyses anteriores and posteriors ones weak, almost equal in length; antrum sclerotised, long and rather broad funnel-like, with sclerotised u-shaped fields posteriorly, slightly extended anteriorly; ductus bursae very short in length, with small lateral sclerotised plate; corpus bursae elongate-ovoid, moderate in length, membranous slightly sclerotised in caudal part, with three short, slightly sclerotised appendix bursae.

Etymology. The species name S. acontioides refers to its external similarity to Acontia species ( Noctuidae, Acontiinae ).

Distribution. Southwest China (Prov. Yunnan). The species is known in China only from its type-locality Prov. Yunnan, Simao, where it occurs in mountains at elevation 1200–1500 m. Single female was collected in May.

Figures

FIGURES 1–15. Stenoloba spp., adult. 1. S. gaoligonga sp. n., male, holotype, slide HHL-2596-1; 2. S. huanxipoa sp. n., male, holotype, slide HHL-3128-1; 3. Ditto, female, paratype, slide HHL-3176-2; 4. S. chlorobrunnea sp. n., male, holotype, slide HHL-6153-1; 5. Ditto, paratype, slide HHL-6153-1; 6. S. ochraceola sp. n., male, holotype, slide HHL-2904-1; 7. S. plumbeoviridis sp. n., male, holotype, slide HHL-2920-1; 8. S. plumbeobrunnea sp. n., male, holotype, slide HHL-2955-1; 9. Ditto, paratype, slide HHL-2958-1; 10. S cucullata sp. n., male, holotype, slide HHL-6161-1; 11. S. asymmetrica sp. n., male, holotype, slide HHL-6184-1; 12. S. acontioides sp. n., female, holotype, slide HHL-6185-2; 13. S. rectilinoides sp. n., male, holotype, slide HHL-2951-1; 14. S. uncata sp. n., male, holotype, slide HHL-2950-1; 15. S. assimilina sp. n., male, holotype, slide HHL-3186-1 [all materials from coll. NEFU].

FIGURES 48–57. Stenoloba spp., female genitalia. 48. S. huanxipoa sp. n., paratype, slide HHL-3176-2; 49. S. acontioides sp. n., holotype, slide HHL-6185-2; 50. S. assimilina sp. n., paratype, slide HHL-3853-2; 51. S. albistriata, slide HHL-6182-2; 52. S. acutivalva, slide HHL-6144-2; 53. S. motuoensis, slide HHL-2924-2; 54. S. speideli, slide HHL-6148-2; 55. S. glaucescens, slide HHL-3185-2; 56. S. nora, slide HHL-6167-2; 57. S. plumbeoculata, slide HHL-6164-2 [all materials from coll. NEFU].