Naryciodes koreana, Sohn, Jae-Cheon & Choi, Sei-Woong, 2017

Sohn, Jae-Cheon & Choi, Sei-Woong, 2017, A new species of Naryciodes Matsumura, 1931 (Lepidoptera: Limacodidae) from Korea, Zootaxa 4273 (3), pp. 439-442 : 440-442

Naryciodes koreana n. sp.

Naryciodes posticalis (nec Matsumura, 1931); Heo, 2016: 195 (misidentification).

Diagnosis. This species is closely related to Naryciodes posticalis Matsumura ( Fig. 3 ), but can be distinguished from the latter in having the narrower, dark brown suffusion on the forewing, and the narrower apex of the valva in the male genitalia ( Figs. 5 a & 6a). Differences between N. posticalis and N. koreana are most obvious in their larvae. Differing from those of N. koreana , the larvae of N. posticalis possess tubercles on anterior angles and at the center of the body ( Kuroko 1983; Nakamura 1987; Murase 2011).

Adults ( Fig. 1 ). Head—Vertex pale brownish gray; scales of frons pale yellowish gray, darkened distally. Antenna 3/ 7 as long as forewing; scape pale yellowish gray, intermixed with fuscous scales; flagellomere pale yellowish gray, intermixed with dark brown scales. Labial palpus oblique, acuminate apically; 1st segment 1/4 as long as 2nd, dark brown, with pale yellowish gray band distally on inner surface; 2nd segment 2× length of 3rd, pale brownish gray, intermixed with fuscous scales on outer surface, pale yellowish gray on inner surface; 3rd segment pale yellowish gray, paler on inner surface.

Thorax—Patagium grayish brown; tegula pale brownish gray, intermixed with brownish gray scales, tinged with dark brown apically and basally; mesonotum pale yellowish gray, intermixed with dark or pale brownish gray scales, tinged with dark brown on posterior 1/7. Foreleg with coxa dark brown, sparsely irrorated with pale brownish gray distally; femur pale yellowish gray, tinged with dark brown on ventrobasal half of inner surface; tibia and tarsomeres dark brown, with pale yellowish gray ring distally. Midleg with coxa pale yellowish gray, tinged with brownish gray distally; femur pale brownish gray, intermixed with fuscous scales basally; tibia and tarsomeres dark brown dorsally, pale grayish orange ventrally, with pale yellowish gray ring distally. Hindleg with coxa pale yellowish gray, tinged with brownish gray distally; femur pale yellowish gray, intermixed with pale grayish brown scale on outer surface; tibia pale grayish orange, intermixed with fuscous scales ventrally; tarsomeres brownish gray, dorsally, pale grayish orange ventrally, with pale yellowish gray ring distally. Forewing length 8.8–11.7mm (n=4), subrectangular, gradually broadened to termen, pale yellowish gray, suffused with dark brown on costal and basal areas; discal spot elliptical, broadly dark brown, with pale brown bar medially; subterminal line as dark grayish brown shade, with zigzagged outer margin along veins; adterminal line comprising black dashes; fringe brownish gray. Hindwing dark yellowish gray, paler basoanteriorly; fringe brownish gray.

Abdomen—Dorsal area pale yellowish brown, suffused with fuscous scales; ventral area pale yellowish brown, sparsely intermixed with dark brown scales. Male genitalia ( Fig. 5 ): Uncus elongate, pointed apically, with small, triangular basal plate; tegumen trapezoidal, bulged lateroposteriorly, as long as uncus; valva elongate, obovate, narrowly round apically, slightly convex at basal 2/5 of costa; sacculus narrow, slightly broadened, setose on basal 1/3; vinculum subquadrate; juxta V-shaped, medially-emarginated along anterior margin; anellus spinulate; phallus ( Fig. 5 a) as long as uncus, with triangular carina posteriorly; cornutal zone spinulate, 2/3 as long as carina. Female genitalia ( Fig. 7 ): Papilla analis subtriangular, setose; apophysis posterioris as long as antrum; apophysis anterioris absent; antrum bowl-shaped; ductus bursae 1.5× longer than corpus bursae, moderately broad, of even width; corpus bursae obovate; signum pairedcrescentiform, juxtaposed with denticulate area.

Larvae ( Fig. 2 ). Body length 9–12mm, elliptical, dome-shaped, pale yellow, tinged with pink anteriorly; medial groove intermittent; lateral groove wrinkled.

Types. Holotype—male, “ HOLOTYPE / Naryciodes / koreana / Sohn et Choi 2017” [red label], “GN: Hamyang / Mt. Jirisan / 13. VIII. 2006 / Marana Park / E127˚ 38' N35˚ 21'/ 745 M”. Deposited in MPNU . Paratypes— 1♀, Korea, Gangwon Prov., Chuncheon, Sabug-myeon, Mt. Yonghwasan , 16 August 2002 (JC Sohn), MPNU ; 1♀, Korea, Chungbuk Prov., Jaecheon, Mt. Weolaksan , 7 May 2004 [larva] on Acer tataricum ssp. ginnala , 27 July 2004 [pupation], 15 August 2004 [emergence] (JC Sohn), rearing # 877, MPNU ; 1♂, Korea, Ulsan City, Ulju, Mt. Ganweolsan (35˚34'037"N 129˚03'191E, 326m "), 24-27 August 2012 (JC Sohn), [ GSN] SJC-1019, MPNU .

Distribution. South Korea.

Host-plants. Sapindaceae— Acer tataricum ssp. ginnala (Maxim.) Wesm. (this study); Acer pictum ssp. mono (Maxim.) Ohashi ; Acer palmatum Thunb. ( Heo 2016) .

Figures

FIGURES 1 – 4. 1. Holotype of Naryciodes koreana n. sp. (insets = labels); 2. Larva of N. koreana n. sp. on Acer tataricum ssp. ginnala (Maxim.) Wesm.; 3. Adult of Naryciodes posticalis Matsumura, male (Mt. Takaosan, Tokyo, Japan, USNM); 4. Wing venation of N. posticalis. Scale bars = 5 mm.

FIGURES 5 – 7. 5. Male genitalia of Naryciodes koreana n. sp., paratype (a = phallus); 6. Male genitalia of Naryciodes posticalis Matsumura (a = phallus); 7. Female genitalia of N. koreana n. sp., paratype (inset = signum).