Encaumaptera devyatkini, Yakovlev & Zolotuhin, 2020

Yakovlev, Roman V. & Zolotuhin, Vadim V., 2020, Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. I. Introduction and genera Encaumaptera Hampson 1893, Orgyarbela gen. nov., and Hollowarbela gen. nov., Ecologica Montenegrina 38, pp. 84-101 : 92

Encaumaptera devyatkini sp. nov.

Figs 8 , 21

Material. Holotype: male, C. Vietnam, Kon Tum Prov., Sa Thay Distr., Bargok , Chu Mot Ray NP, 14º25′N / 107º43′E, 680 m, 20−23.iii.2012, leg. V. Zolotuhin ( MWM, slide Genitalpräparat Heterocera Nr. 27.986).

Description. Length of fore wing 15 mm.Thorax and abdomen densely covered with dark-brown scales. Fore wing dark-brown, with poorly expressed pattern of lighter brown bands: postdiscally transverse, medially longitudinal, and rare black transverse strokes throughout all wing area. Hind wing dark-brown without pattern.

Male genitalia. Uncus relatively short, robust, apically rounded, basally strongly sclerotized; tegumen massive, with wide leaf-like processes at gnathos arms bases; gnathos arms thick, long; gnathos massive; valve narrow, slightly narrowing from base to apex, with very small cut on border between medial and distal third of costal edge, long leaf-like process at base of costal edge of valve, costal and abdominal edges strongly sclerotized, in medium third connected with narrow bridge, tip of abdominal edge slightly drawn, small triangle harpe on inner surface of valve closer to costal edge; juxta scaphoid; saccus semicircular, tiny; phallus thick, short, almost straight, with small paired cornuti on lateral surfaces of vesica.

Diagnosis.The new species differs externally from E. aurora sp. n. in the dark hind wings, from E. stigmata in the poorly modified pattern on the fore wing. From both species it clearly differs in the genital structure: the shorter uncus, the thin sclerotized bridge between the costal and abdominal margins of the valve, the poorly expressed cut on the costal edge of the valve.

Habitat and details of biology ( Fig. 29 ).The species was collected in the rainy season in an undisturbed very dense tropical mountain forest, attracted to the light, near a sheer rock wall cut along a mountain road above a mountain stream. At rest, folds its wings and sits like a Cossid moth without lifting the abdomen up.

Etymology. The species is named after Alexey L. Devyatkin (1957–2012) ( Fig. 31 ), who worked at the Department of Entomology, Faculty of Biology, the Moscow University. He was one of the largest specialists in Oriental Hesperiidae , Lepidoptera of Vietnam, and also in metalmarks of the genera Melitaea and Mellicta . He is the author of more than 60 taxa of Rhopalocera from the Palaearctic and Oriental region, first of all of the fauna of Vietnam.

Distribution. Central Vietnam.

Figures

Figures 1−16. Adult specimens of Oriental Metarbelidae: 1. Indarbela tetraonis (Moore, 1879), male, S. India, Madurai, 18.vii.1985, leg. M. Eckrich (ZSM); 2. Indarbela tetraonis (Moore, 1879), female, S. India, Madurai, 2.vii.1985, leg. M. Eckrich (ZSM); 3. Squamicapilla arenata W. Schultze, 1908, male, the Philippines, E. Luzon, Aurora Prov., Sra Madre, 14 km S of Dilalongan, Dapalan river, 50 m, 16°02.709N / 121°42.667E, 11/12 Feb 2008, J.H. Lourens/K. Knoblich leg. (MWM); 4. Squamura maculata Heylaerts, 1890, male, Indonesia, East Java, Mt. Argopuro, 1200 m, 7−12.x.2004, leg. Jäkl (MWM); 5. Encaumaptera stigmata (Hampson, 1891), male, type (from Hampson 1891); 6. E. stigmata, male, Sri Lanka (Ceylon), Prov. Uva (Yala Nat. Park), Monaragalla/Gelge, 100 m, 29−30.v.1995, leg. Schnitzler (MWM); 7. E. stigmata, male, Sri Lanka (Ceylon), Prov. Uva (Yala Nat. Park), Monaragalla distr., Gelge, 100 m, 2−4.vi.1995, leg. Schnitzler (MWM); 8. E. devyatkini sp. nov., male, holotype (MWM); 9. E. aurora sp. nov., male, holotype (MWM); 10. E. aurora sp. nov., male, paratype, Thailand, Isthmus of Kra, Ranong [9°57′ N 98°38′ E], TV-station, 500 ms, Mitte April 2002, leg. loc. coll., ex coll. S. Loeffler (RYB); 11. Hollowarbela kinabalua (Holloway, 1976), male, holotype (from Holloway 1980); 12. H. kinabalua, male, Malaysia, Sabah, Trus Madi, 1100 m, 4−24.iv.2002, Martini leg. (MWM); 13. Orgyarbela millemaculata (Hampson, 1897), male, syntype (NHMUK); 14. O. millemaculata (Hampson, 1897), female, Khasis, May 1894 (NHMUK); 15. O. kerri sp. nov., male, holotype (NHMUK); 16. O. mackwoodi sp. nov., male, holotype (NHMUK). Scale bar 1 cm.

Figures 17−26. Male genitalia of Oriental Metarbelidae:17. Indarbela tetraonis (Moore, 1879), S. India, Madurai (slide ZSSM 2016/4 Coss); 18. Squamicapilla arenata W. Schultze, 1908, the Philippines, E. Luzon, Aurora Prov. (slide Genitalpräparat Heterocera MWM Nr. 27.981); 19. Squamura maculata Heylaerts, 1890, Indonesia, East Java (slide Genitalpräparat Heterocera MWM Nr. 27.983); 20. Encaumaptera stigmata (Hampson, 1891), Sri Lanka (Ceylon) (GenPr MWM: 26.649); 21. E. devyatkini sp. nov., holotype (Genitalpräparat Heterocera MWM Nr. 27.986); 22. E. aurora sp. nov., holotype (slide Genitalpräparat Heterocera MWM Nr. 26.648); 23. Orgyarbela millemaculata (Hampson, 1897), Khasis (slide NHMUK010315538); 24. O. kerri sp. nov., holotype (slide NHMUK 010315534); 25. O. mackwoodi sp. nov., holotype (slide NHMUK 010315536); 26. Hollowarbela kinabalua (Holloway, 1976), Malaysia, Sabah, Trus Madi (Genitalpräparat Heterocera MWM Nr. 28.047).

Figures 29−30. Habitats of Metarbelidae: 29. E. devyatkini sp. nov. (photo by Vadim Zolotuhin); 30. H. kinabalua (Holloway, 1976) (photo by Alexey Yakovlev).

Figures 31−33. Portraits of Entomologists: 31. Alexey L. Devyatkin (photo from private archive of Anatoliy Krupitsky); 32. A.F.G. Kerr (photo from http://www.nationaalherbarium.nl/); 33. F.M. Mackwood (photo from http://www.mackply.com/history-of-mackwoods.html)