Tambana xilinga, Behounek, G., Han, H. L. & Kononenko, V. S., 2015

Behounek, G., Han, H. L. & Kononenko, V. S., 2015, A revision of the genus Ta mb ana Moore, 1882 with description of eight new species and one subspecies (Lepidoptera, Noctuidae: Pantheinae). Revision of Pantheinae, contribution XIII, Zootaxa 4048 (3), pp. 301-351 : 316-317

Tambana xilinga sp. n.

( Figs 39 , 103 )

Type material. Holotype. CHINA: male, Prov. Sichuan, Xilin Xue Shan, road Dawe to Lushan, 2500–2800 m, 30°854′N, 102°759′E, Floriani A. & Saldaitis A. leg., 21.vii.2011, slide GB8066 male, BC ZSM Lep 58642, coll. GB/ ZSM.

Note. The specimen labelled as BC ZSM Lep 58642 has been used for barcoding. Molecular distance based on the Kimura two-parameter model for COI DNA barcodes between T. xilinga and T. mekonga is 3,79%; distance between T. xilinga and T. helmuti is 7,81% and distance between T. xilinga and T. fansipana is 7,47%.

Diagnosis. T. xilinga is similar to T. mekonga but larger in wingspan and differs externally by less expressed metallic shining, more coarse crosslines and more expressed whitish dusting on forewing. Hindwing differs by wider and more diffused brownish-grey terminal band and less expressed yellow colouration of the basal third of wing. In the male genitalia it differs by thinner uncus, broader valva, and thinner harpe and also by shape of aedeagus and less developed arming of vesica. Although T. xilinga externally and by the male genitalia is hardly separated from T. mekonga , we consider them as a distinct species based on their DNA barcoding.

Description. Adult ( Fig. 39 ). Wingspan 45 mm. Head whitish-grey; thorax blackish-brown; tegulae and patagia blackish, with white bordering. Forewing ground colour dark blackish-brown with somewhat metallic shining and intensive whitish dusting, more expressed in the medial field; crosslines black, twin, coarse; basal line represented as short black streak; antemedial line strongly dentate, black, outlined inwardly with brown and whitish suffusion; orbicular very small, distinct as whitish spot encircled with black; medial shadow wide, diffused, black; reniform brown in centre, outlined inwardly with black; pale whitish-brown diffused dash lies outward reniform to antemedial line; subterminal field above reniform with intensive whitish dusting; subterminal line diffused, as a row of black dashes, outlined inwardly with brown; terminal line separated for row of diffused blackish-brown triangular streaks; cilia greyish-brown, paler opposite veins. Hindwing dull-yellow in basal third, with wide, around two third of wing wide greyish-brown terminal band; greyish-brown.

Male genitalia ( Fig. 103 ). Uncus relatively short, beak-like, thinner and longer than in T. mekonga , with small apical hook; tegumen broad, somewhat shorter than vinculum, without penicular extensions; vinculum V-shaped; transtilla with narrow leave-like lobes; juxta shield-like, broad; valva moderate large, broad basally, with parallel margins for two third of length, dissimilar to T. mekonga with valva constricted apically in distal third and rounded in the apex; costa with small protuberance opposite base of harpe. Aedeagus shorter than in T. mekonga , thick, slightly curved medially, with prominent bar apically; carina broad, heavily sclerotised, finely scobinate; vesica broadly-tubular with subapical row or moderate cornuti narrower than in T. mekonga and very small separated patch of small cornuti.

Female unknown.

Etymology. The species named by its type-locality, Xilin Shue Shan region in Sichuan province of China.

Distribution and bionomy. Southwest China (Prov. Sichuan). The moth was collected in July at elevation 2500–2800 m.

Figures

FIGURES 33 – 40. Tambana spp., adults. 33. T. c-album, male, China, Shaanxi, slide GB 8242 (GB / ZSM); 34. T. c-album, male, China, Shaanxi, slide GB 12166 (JS / ZSM); 35. T. similina, male, holotype, China, Yunnan slide, DS-ZFMK (ZFMK); 36. T. similina, male, paratype, China, Yunnan, slide VK 2018 ZFMK (ZFMK); 37. T. nekrasovi, male, holotype, China, Shaanxi, slide VK-ZISP (ZISP); 38. T. nekrasovi, male, China, Sichuan, slide GB 1218 (PGM); 39. T. xilinga sp. n., male, holotype, China, Sichuan, slide GB 7401 (GB / ZSM); 40. T. sp., male, Myanmar, slide GB 7401 (GB / ZSM).

FIGURES 101 – 103. Tambana spp., male genitalia. 101. T. similina, holotype, China, Yunnan, slide DS- 2013 (ZFMK); 102. T. nekrasovi, holotype, China, Shaanxi, slide VK-ZISP, coll. Nekrasov / ZISP; 103. T. xilinga sp. n., holotype, China, Sichuan, slide GB 8066 (GB / ZSM).