Subleuconycta sugii Boursin, 1962

Kiss, Ádám, Wu, Shipher & Matov, Alexei Yu., 2017, A new Subleuconycta (Lepidoptera: Noctuidae: Acronictinae) species from Taiwan, Zootaxa 4237 (3), pp. 593-600 : 599

Subleuconycta sugii Boursin, 1962

( Figs 7, 8 , 17–20 , 23 , 27, 28 )

Subleuconycta sugii Boursin 1962 , Zeitschrift der Wiener Entomologischen Gesellschaft, 42: 138, figs 1, 2. Type locality: [Taiwan]

Formosa (NIAES, Tsukuba).

Material examined. Non-type material. TAIWAN, NANTOU Co.: 2 males, 2 females, Lushan Spa , ca. 1000m, 24- 27.viii.1983, leg. H. Yoshimoto (coll. NSMT) ; ca. 24°01’19”N, 121°09’16”E, LF, 23.v.2005, leg. M.-Y. Chen & U. Buchsbaum (coll. ZSM); 1 male, Lushan Spa , 1200 m, 20-23.viii.1984, leg. Y. Kishida (coll. GB) ; 1 female, Lushan Spa , ca. 1300 m, 24°01’N, 121°09’E, LF, 29.iv.2004, leg. M.- Y. Chen & U. Buchsbaum (coll. ZSM) ; 1 female, 15 km N of Puli , 500 m, 23.iv.1997, leg. S. T. Kovács, slide No.: KA1084f (coll. STK) ; 1 male, 15 km N Puli, Hui Sun Forest Area , 500 m, 12-13.iv.1997, leg. Csorba & Ronkay, slide No.: KA 1082m (coll. HNHM) ; 1 female, Hui Sun Forest Area, Guandaushi LTER site, 950 m, 24°04’49”N, 121°02’08”E, 12-14.viii.1999, leg. A. Kun & E. Juhász, slide No.: KA1109f (coll. GR) ; 1 male, Jian-Tai Forest Trail, 1112m, 6.ii.2014, leg. L. C. Shih (coll. ESRI) ; TAICHUNG Co.: 1 male, Anma-Shan, Hooping , 2000 m, 01-02.vii.1997, leg. S. T. Kovács, slide No.: KA 1083m (coll. HNHM) ; TAOYUAN Co.: 1 male, Galahe , 1000m, 25.viii.2010, leg. S. Wu, slide No.: TFRI 153277 (coll. TFRI) .

Diagnosis. Adult ( Figs 7, 8 ). Wingspan 33–35 mm. Subleuconycta sugii differs from S. calonesiota ( Figs 1–4 ) and S. palshkovi ( Figs 5, 6 ) by its average larger size; the pale brownish-greyish ground colour of forewing; the slightly contrasting, more wavy antemedial and somewhat crenulated postmedial line; the thinner dark line and evenly brown patch between the black outlined orbicular spot and reniform stigmata; the rounded hindwing with slightly wavy postdiscal line. Male genitalia ( Figs 17–20 ). Subleuconycta sugii differs from S. calonesiota ( Figs 9–12 ) and S. palshkovi ( Figs 13–16 ) by its straighter uncus without medial widening; the basally broader subdeltoidal juxta; the more or less evenly curved valvae; the slightly wider corona; the basally widest valvae; the rather rounded apex of valvae (not narrowing); the narrower, tapered saccular processus; the somewhat stronger aedeagus with short coecum; the broader vesica with elongated basal and reduced distal diverticulum. Male 8th abdominal segment ( Fig. 23 ). See the details under S. calonesiota . Female genitalia ( Figs 27, 28 ). Subleuconycta sugii can be distinguished from S. calonesiota ( Figs 24, 25 ) and S. palshkovi ( Fig. 26 ) by its more rounded shape of corpus bursae without signum; the lack of the long, tubelike part of the corpus bursae; the rather quadrangular appendix bursae.

Distribution and bionomics. This species is endemic to Taiwan and distributed in mid-elevation primary broad-leaf forests. The adults occur from Feburary to August, comparatively rarer than S. calonesiota .

Figures

FIGURE 1 – 8. Subleuconycta spp. adults. 1. S. calonesiota sp. n., male, holotype, Taiwan, Taitung Co., Hsiangyang, slide No.: KA 1046 m (coll. HNHM); 2. ditto, female, paratype, Taiwan, Nantou Co., Hohuachi, slide No.: KA 1047 f (coll. HNHM); 3. ditto, male, paratype, Taiwan, Nantou Co., Meifeng (coll. TFRI); 4. ditto, female, paratype, Taiwan, Nantou Co., Meifeng, (coll. TFRI); 5. S. palshkovi, male, lectotype, Russia, Primorsky Krai, Sutshan, Preparation No. 2680 (coll. ZISP); 6. ditto, male, Russia, Primorsky Krai, Kedrovaya Pad’ reserve, slide No.: Matov 0411 (coll. ZISP); 7. S. sugii, male, Taiwan, Taoyuan Co., Galahe (coll. TFRI); 8. ditto, female, Taiwan, Taichung Co., Hui-Sun Experimental Forest Area, slide No.: KA 1109 f (coll. GR). Bar scale = 10 mm.

FIGURE 9 – 20. Male genitalia of Subleuconycta spp. 9 - 10. S. calonesiota, sp. n., holotype, Taiwan, Taitung Co., Hsiangyang, slide No.: KA 1046 m (coll. HNHM) 9. valvae 10. aedeagus; 11 – 12. ditto, paratype, Taiwan, Nantou Co., Biluxi, slide No.: TFRI 453 (coll. TFRI) 11. valvae 12. aedeagus; 13 – 14. S. palshkovi, lectotype; Russia, Primorsky Krai, Sutshan, Preparation No. 2680 (coll. ZISP) 13. valvae 14. aedeagus; 15 – 16. ditto, North Korea, Prov. North Pyongan, Mts. Myohyang-san, slide No.: KA 1045 m (coll. HNHM) 15. valvae 16. aedeagus; 17 – 18. S. sugii, Taiwan, Taichung Co., An-ma-Shan, slide No.: KA 1083 m (coll. HNHM) 17. valvae 18. aedeagus; 19 – 20. ditto, Taiwan, Taoyuan Co., Galache, slide No.: TFRI 153277 (coll. TFRI) 19. valvae 20. aedeagus. Bar scale = 1 mm.

FIGURE 21 – 23. Male 8 th abdominal segments of Subleuconycta spp. 21. S. calonesiota, sp. n., holotype, Taiwan, Taitung Co., Hsiangyang, slide No.: KA 1046 m (coll. HNHM); 22. S. palshkovi, North Korea, Prov. North Pyongan, Mts. Myohyang-san, slide No.: KA 1045 m (coll. HNHM); 23. S. sugii, Taiwan, Taichung Co., An-ma-Shan, slide No.: KA 1083 m (coll. HNHM). Bar scale = 1 mm. Left side sternite, right side tergite.

FIGURE 24 – 28. Female genitalia of Subleuconycta spp. 24. S. calonesiota, sp. n., paratype, Taiwan, Nantou Co., Hohuachi, slide No.: KA 1047 f (coll. HNHM); 25. ditto, paratype, Taiwan, Nantou Co., Meifeng, slide No.: TFRI 177668 (coll. TFRI); 26. S. palshkovi, South Korea, [Prov. Kangweon or Gyeonggi], slide No.: hhl- 784 (coll. KNA); 27. S. sugii, Taiwan, Nantou Co., 15 km N of Puli, slide No.: KA 1084 f (coll. STK); 28. ditto, Taiwan, Taichung Co., Hui-Sun Experimental Forest Area, slide No.: KA 1109 f (coll. GR). Bar scale = 1 mm. S. palshkovi not scaled.