Alucita japonica (Matsumura)

Byun, Bong-Kyu, 2006, Alucitidae (Lepidoptera) of Korea: Description of a new species and records of two previously unrecorded species, Zootaxa 1188, pp. 37-47 : 40-43

Alucita japonica (Matsumura) ( Figs. 2–5 )

Orneodes japonica Matsumura, 1931: 1059 .

Alucita japonica: Inoue, 1982: 288 (vol. 1), 216 (vol. 2), pl. 31: 1.

Adult. Head ( Fig. 3 ): Brownish gray. Labial palpus densely scaled, brownish gray; 2nd segment brownish gray laterally, somewhat whitish gray dorsally, rather broad medially; 3rd segment slender, 0.7 times as long as horizontal diameter of compound eye. Thorax ( Fig. 2 ): Wingspan 13 mm. Forewing grayish brown with six fuscous brown, evenly spaced marks along costa; 1 st lobe with 7 small distinct trapezoidal spots, width of middle area ca. 0.41 mm; spots I–III short, reaching middle of each lobe; spots IV–VI rather wide, reaching the margin of each lobe; spot III small, before the point of lobe fusion; spot VI most wide; apical spot tiny, at apex; median fascia on 3 rd –6 th lobes located at the level of costal spot III, nearly half length of costal spot IV; subterminal spots on 3 rd –6 th lobes at the level of costal spot V, nearly same length as median spots. Hindwing similar to forewing in coloration, but rather narrow with several small spots along each lobe.

Male genitalia ( Fig. 4 ): Tegumen narrow, small, longer than wide. Uncus short, ca. 1/4 length of aedeagus, gradually broadening terminally, slightly rolled in lateral view, apically with 4 downward directed points. Gnathos short, attenuate terminally, but not acute. Valva short, fairly slender, with short projection basally; cucullus slender, clavate. Aedeagus long with strongly sclerotized area ventrally, four times as long as uncus, slightly arched, broadened in distal half, several minute cornuti in vesica; coecum thickened, 1/2 length of aedeagus.

Female genitalia ( Fig. 5 ): Papilla analis slender, narrowed terminally. Corpus bursae long, ovate, membranous towards middle, minutely spiculated from junction with ductus bursae to middle; small stellate signum near middle with a pointed termination. Ductus bursae very short, ca. 1/6 length of corpus bursae, covered with numerous spinules, rather densely distributed around middle part to the entrance of corpus bursae. Ductus seminalis arising near junction of corpus bursae and ductus bursae.

Material examined: 2♂, 6♀, Otter Cave , Dong­gang River, Youngweol, Prov. Gangweon­do, 12. IX. 1998 (B.K. Byun) ­ genitalia slide number KNIC­715(♂), 714(♀) .

Distribution: Korea (new record), Japan.

Host: Unknown.

Remarks: The species has two or three generations a year, with adults collected from late spring to fall. According to Inoue (1982), this species overwinters in the adult stage as do many Alucitidae .

Pterotopteryx koreana sp. nov.

(Figs. 6–9)

Types: HOLOTYPE ♂, Unduryeong, Mt. Gyebang, Prov. Gangweon­do, 14. VI . 1995 (B.K. Byun)—genitalia slide number KNIC­716(♂), Type Serial Number : KNIC­T121 . PARATYPE ♀, Unduryeong , Mt. Gyebang, Prov. Gangweon­do , 14. VI . 1995 (B.K. Byun)—genitalia slide number KNIC­717(♀), Type Serial Number : KNIC­T122 .

Diagnosis: This species is superficially very similar to A. japonica (M.) but differs by its longer uncus lacking a forked apex and its longer gnathos. The most conspicuous difference is the large triangular juxta of male genitalia.

Description: Adult. Head (Fig. 7): Densely scaled, whitish ash­gray. Labial palpus whitish dorsally, ca. 2.5 times as long as horizontal diameter of compound eye; 2nd segment with dense scaling, ca. 1.5 times as long as horizontal diameter of compound eye; 3rd segment slender, pointed terminally, nearly as long as horizontal diameter of compound eye. Thorax (Fig. 6): Whitish dorsally. Wingspan 15 mm. Forewing divided into six lobes, deeply emarginated between the first cleft; 1 st lobe with 7 small slender spots, width of middle area ca. 0.30 mm; spots I–III weak reaching 1/3 of each lobe; spot III small close to spot II, just before branching point between 1 st and 2 nd lobes; spots IV–VI somewhat wide, reaching to the middle of each lobe; spot IV slender but distinct; apical spot very small, at apex; median fascia on 3 rd –6 th lobes located at the level of costal spot IV, more than twice as long as costal spot IV; subterminal spots on 3 rd –6 th lobes at the level of costal spot V nearly same length as median spots. Hindwing color and pattern similar to that of forewing, but somewhat weaker.

Male genitalia (Fig. 8): Uncus narrow in lateral view, rather attenuate terminally, dull flint­head­shaped in front view, slightly widened below apex, then narrowed near middle, approximately as long as tegumen. Gnathos short, half as long as uncus, acute terminally. Valva somewhat broadened laterally, strongly sclerotized in basal half, membranous beyond 2/3 length; cucullus short, 1/3 length of valva, rounded terminally. Juxta long triangular­shaped, membranous. Aedeagus nearly straight, strongly sclerotized ventrally, longer than valva; coecum 0.7 times as long as aedeagus; two large cornuti in vesica. Vinculum with rectangular posterior margin.

Female genitalia (Fig. 9): Papilla analis narrowly rounded terminally. Corpus bursae long, somewhat ovate, membranous, granulated on posterior half, with somewhat rounded signum comprising of a group of minute dull spinules at middle. Ductus bursae ca. 1/3 length of corpus bursae, spiculated from ca. 1/3 to corpus bursae. Ductus seminalis arising just after junction of corpus bursae and ductus bursae.

Distribution: Korea.

Figures

FIGURES 2–5. Alucita japonica (Matsumura): 2. Adult; 3. head; 4. male genitalia (a. front view of uncus; b. right valva; c. front view of vinculum; d. aedeagus); 5. female genitalia.