Stenoloba assimilina, 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 : 310

Stenoloba assimilina sp. n.

( Figs 15 , 43 , 50 )

Type material. Holotype: male, China, Aut. Reg. Xizang, Linzhi, Layue , 2200 m, 14–15.viii.2014, H.L. Han leg., slide HHL-3186-1, coll. NEFU . Paratypes: 2 males, 3 females, Aut. Reg. Xizang, Yigong, Tongmi , 8.viii.2017, H.L. Han leg., genit . slide HHL-3847-2 (female); 1 male, 2 females, Prov. Jiangxi, Guanshan Nature reserve, 21– 23.viii.2017, H.L. Han leg., genit . slide HHL-3854-1 (male); 3 males, 1 female, Aut. Reg. Xizang, Yigong, Longmaqu , 6 and 7.viii.2017, H.L. Han leg., genit. slide HHL-3692-1, coll. NEFU .

Diagnosis. The new species belongs to S. jankowskii species group. It is close to S. assimilis (Warren) , but differs from the last by wide blackish with green dusting in basal and subbasal fields, straight black antemedial line and distinct black orbicular spot. In male genitalia, it differs by more massive and shorter uncus, somewhat shorter and broader shape of valva and arming of cucullus with strong spines and separated spine in subapical area. Aedeagus of S. assimilina compared with those of S. assimilis have much broader vesica, armed with broader flat cornutus.

Description. Adult ( Fig. 15 ). Wingspan 23 mm. Head and thorax covered with grey scales, patagia with green in center. Forewings broad, rather short, triangular; ground colour of forewing ash-grey with some olive-green tint; basal part of wing darker, blackish, with intensive suffusion of green scales in basal field; antemedial fascia straight, formed by twin black lines and greenish suffusion between them; orbicular as black rounded spot; outer part of medial field grey, with pale ash-grey suffusion; reniform indistinct; postmedial line thin, black, tinged with green; subterminal and terminal fields dark grey, darker in costal area, with pale ash-grey subapical dash; terminal line thin, blackish, cilia twin, dark-grey. Hindwing dark yellowish grey, somewhat darker with inner part and traceable discal spot; cilia grey with pale inner line.

Male genitalia ( Fig. 43 ). Uncus short, flattened, rather massive; tegumen and vinculum narrow, tegumen two times higher than vinculum; juxta deltoid, wider basally; valva simple, moderate long, narrow, with parallel margins, distally slightly tapering; rounded apically; apex of valva with 6–8 strong setae and one separated thick spine ventro-subapically, directed ventrally; sacculus well bulged dorsally. Aedeagus relatively small, shorter than length of valva; vesica basally tubular, medially, bearing one broad diverticulum and armed with a single, flattened broad-based, strong spine.

Female genitalia ( Fig. 50 ). Ovipositor weak, moderate, with more or less quadrangular papillae anales; apophyses anteriores and posteriors ones weak, almost equal in length; antrum sclerotised, long and funnel-like, with wide sclerotised v-shaped cut posteriorly, slightly extended anteriorly; ductus bursae short in length, with lateral sclerotised band; corpus bursae elongate-ovoid, with caudal extension, membranous and slightly sclerotised in caudal part.

Etymology. The species name S. assimilina refers to its affinity to closely related species S. assimilis .

Distribution. Southwest China (Xizang Aut. reg. and Prov. Jiangxi, Guanshan Nature reserve). The species is known in China only from its type-locality where it occurs in mountain forest at elevation 2200 m. The type-series was collected in August.

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 40–43. Stenoloba spp., male genitalia. 40. S. rectilinoides sp. n., holotype, slide HHL-2951-1; 41. S. rectilinea, slide HHL-6135-1; 42. S. uncata sp. n., holotype, slide HHL-2950-1; 43. S. assimilina sp. n., holotype, slide HHL-3188-1 [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].