Deltote walonga, Han, H. L. & Kononenko, V. S., 2015

Han, H. L. & Kononenko, V. S., 2015, A review of the genus Deltote Reichenbah, Leipzig, 1817 with description of a new species from China (Lepidoptera, Noctuidae: Eustrotiinae), Zootaxa 4007 (4), pp. 580-587 : 586-587

Deltote walonga sp. n.

( Figs 8, 9 , 16 , 22 )

Type material. Holotype: male, China, Yunnan, Lijiang, Wanlong, 2400 m, 10–13.vii.2009 (H.L. Han & M.J. Qi) [ NEFU]; genitalia prep. HHL-1380-1. Paratype: 1 female with same label, genitalia prep. HHL-1381-2. The holotype and paratype are deposited in the collection of Northeast Forestry University, Harbin, China.

Diagnosis. No other Palaearctic Eustrotiinae species are similar to D. walonga . Externally the new species resembles D. uncula ( Fig. 2 ), but can easily be separated from it by having cream-yellowish coloration of head and thorax and broad cream-yellowish fields along outer and tornal margins of forewing. Male genitalia of D. walonga are somewhat similar to that of D. bankiana ( Fig. 11 ), but differ from broader penicular lobe, very long thin uncus and more simplified valva. The female genitalia differ from that of other Deltote species in shape of antrum, very long ductus bursae and by presence of short appendix near joining of ductus with corpus bursae.

Description. Adult ( Fig. 8, 9 ). Wingspan 17–18 mm. Forewing broad, triangular. Head, palps and thorax yellowishgrey; ground colour of forewing dark greyish-brown; wing pattern formed by large greyish-brown field continued from costal part of wing base to postmedial line and two wide creamy-yellowish fields bordered with thin white bordering lines; the wing pattern of dark field represented by hardly traceable antemedial line, indistinct orbicular and reniform and hardly traceable postmedial line; pale vertical oblique field cross wing from apex to one third of tornal margin; it outlined inwardly by narrow white line and bearing distinct blackish spot on vein M2; cilia yellowish-grey, blackish in tornal angle; horizontal pale field bearing blackish spot in basal part of wing, outlined in upper part by white line, separated from vertical field by thin blackish line. Hindwing pale yellowish-grey; cilia pale.

Male genitalia ( Fig. 16 ). Uncus thin, very long, curved, gradually subtle apically; tegumen broad, with ear-like broad flattened penicular lobes; juxta as vertical plate-like; vinculum broad, U-shaped; valva simple, without extensions, broad basally, slightly constricted medially and broadened apically. Aedeagus with long coecum; carina broad, vesica tubular, without cornuti.

Female genitalia ( Fig. 22 ). Ovipositor narrow, quadrangular, apophyses anteriores and posteriores weak, equal in length; antrum funnel-like, weakly sclerotised, ostium oval; ductus bursae thin and very long, equal to corpus bursae in length, weakly, sclerotised, slightly ribbed; corpus bursae rather long, narrower in caudal part, sack-like extended in proximal part, with short appendix near joining of ductus with corpus bursae.

Etymology. The species name is referred to its type-locality, Walong village, Prov. Yunnan, China.

Distribution. Southwest China, Prov. Yunnan. The species is known only from its type-locality. Mesophilous species occurs in open meadows and forest edges at elevation 2400 m.

The present study was supported by the National Natural Science Foundation of China (No. 31272355), and the Fundamental Research Funds for the Central Universities (No. 2572014DA02) and by DFG grant for V.S. Kononenko. We thank to Dr. Dieter Stüning (Bonn, Germany) for providing of the research facilities in the collection of ZFMK.

Figures

FIGURES 1 – 10. Deltote spp., adults and habitat of D. walonga. 1. D. bankiana, Russia, Ural, KN; 2. D. uncula, Russia, Ural, KN; 3. D. nemorum, Japan, FMNH; 4. D. deceptoria, Russia, Transbaikalia, HNHM; 5. D. melaleuca, holotype Lithacodia shansiensis, ZFMK; 6. D. melaleuca, illustration by Hampson (1910); 7. D. melaleuca, China, Beijing; 8, 9. D. walonga, China, Prov, Yunnan (8 — male, holotype; 9 — female, paratype). 10. Gardens, meadow and clearings at elevation 2400 m—habitat of D. walonga in South-West China, Prov. Yunnan.

FIGURES 11 – 16. Deltote spp., male genitalia. 11. D. bankiana, S Korea, genit. prep. ASB 5045; 12. D. uncula, S Korea, genit. prep. HHL- 416 - 1; 13. D. nemorum N China, genit. prep., HHL- 1167 - 1; 14. D. deceptoria, Russia, Primorye, genit. prep., VK 741; 15. D. melaleuca, N China, genit. prep. HHL- 3067 - 1; 16. D. walonga, holotype, SW China, genit. prep. HHL- 1380 - 1.

FIGURES 17 – 22. Deltote spp., female genitalia. 17. D. bankiana, S Korea, genit. prep. ASB 5238; 18. D. uncula, Russia, Primorye, genit. prep. VK 739; 19. D. nemorum N China, genit. prep., VK 17 / 05; 20. D. deceptoria, Russia, Primorye, genit. prep., VK 740; 21. D. melaleuca, China, genit. prep. HHL- 1226 - 2; 22. D. walonga, paratype, SW China, genit. prep. HHL- 1381 - 2.