Nemophora chalybeella ( Bremer, 1864 )

Sun, Hao, Wang, Shuxia & Li, Houhun, 2022, Review of the degeerella species group of the genus Nemophora Hoffmannsegg 1798 (Lepidoptera: Adelidae) from China, Zootaxa 5219 (4), pp. 301-338 : 310-312

Nemophora chalybeella ( Bremer, 1864)

( Figs 8, 9 , 33 , 49 )

Adela chalybeella Bremer, 1864: 92 . TL: Russia (Siberia).

Nemophora chalybeella: Kozlov, 1997b: 43 .

Material examined. CHINA, Beijing: 1♀ , Baihuashan , 1186 m, 22.VI.2009, leg. JM Lv, slide No. SH 20081 ; Gansu: 1♀ , Mt. Gaoying , 10.VI.1964, leg. Y Zhou, SY Liu, slide No. SH20062 ; Hebei: 1♀ , Mt. Wuling , 800 m, 1.VII.2012, leg. HH Li & SX Wang et al., slide No. SH20110 ; 1♀, Mt. Wuling , Xinglong County, 1000 m, 17.VI.2014, leg. SR Liu et al., slide No. SH 20104 ; 3♀, Wuyuezhai, Lingshou County, Shijiazhuang , 928 m, 5−9. VII.2016, leg. SH Lu & H Rong, slide No. SH 20098 ; 1♀, Erdaoquanzi Village, Liaoheyuan , 1280 m, 14.VII.2016, leg. SN Zhao & SR Li ; 3♀, Guapaishu Village, Xinfeng Farm , Mulan County, 1189 m, 10.VII.2016, leg. SN Zhao & SR Li, slide No. SH 20112 ; Henan: 1♂ , Lingshansi, Luoshan , 350 m, 21.V.2000, leg. HL Yu, slide No. ZDD01422 ; 8♂ 6♀, Mt. Wangwu, Jiyuan , 700 m, 3−5.VI.2000, leg. HL Yu, slide Nos. SH 19041 ♂, SH19117 ♂, SH20209 ♀, SH20229 ♂; 3♂ 1♀, Mt. Song, Dengfeng , 800 m, 9.VI.2000, leg. MC Wei & HL Yu, slide Nos.SH 19121 ♂, SH19122 ♀; Liaoning : 1♀, Mt. Qian, Anshan , 5.VII.2010, leg. JY Liu & YP Cai, slide No. SH 20080 ; Ningxia: 3♀ , Liupanshan Botanical Garden , 1900 m, 30.VI.2007, leg. XP Wang, slide No. SH 20044 ; 1♀, Qiuqianjia, Qiuqianjia Farm, Mt. Liupanshan , 1700 m, 1.VII.2008, leg. SL Hao & ZW Zhang, slide No. SH 20231 ; Shaanxi: 2♀ , Jiefangmen Village, Houzhenzi Town , Zhouzhi County, 1750 m, 17.VII.1987, leg. HH Li, slide No. SH 20004 ; 6♀, Yaodian Village , Ganquan County, 975 m, 18−19.VI.2019, leg. S Yu, slide Nos. SH 20011, SH20156, SH20207 ; 2♂ 11♀, Huaishu Village, Ziwuling , Fu County, 1150 m, 21−23.VI.2019, leg. S Yu, slide Nos. SH 20023 ♂, SH20029 ♀; 1♂ 2♀, Yulin, Zhiluo Town , Fu County, 1244 m, 24−25.VI.2019, leg. S Yu, slide Nos. SH 20026 ♀, SH20230 ♂; 2♂, Diantou Town , Huangling County, 921 m, 28.VI.2019, leg. S Yu, slide No. SH 20030 ; 1♀, Tai’an Town , Yijun County, 1274 m, 29.VI.2019, leg. S Yu, slide No. SH 20309 ; Shanxi: 3♀ , Mt. Jiexiumian, Jinzhong , 1370 m, 16−17.VII.2014, leg. TT Liu et al., slide No. SH 20103 ; 1♂, Xizhashui Village , Lingchuan County, 900 m, 16.VII.2010, leg. HY Bai & LL Yang, slide No. SH 20100 ; Sichuan: 1♀ , Shaoyaogou, Anzihe, Chengdu , 1598 m, 21.VI.2016, leg. KJ Teng & XF Yang, slide No. SH 20210 ; Tianjin: 3♀ , Mt. Baxian, Ji County, 450 m, 24‒25.VI.2001, leg. HH Li et al., slide No. SH 20178; Heishuihe, Mt. Baxian : 7♂ 3♀, 500 m, 9−15.VI.2009, leg. BB Hu et al., slide No. SH20072 ♂, 2♀, 500 m, 2.VII.2009, leg. BB Hu et al., slide No. SH20204, 1♀, 500 m, 19.VI.2009, leg. J Zhang et al., slide No. SH20205, 1♂, 500 m, 8.VII.2009, leg. ZP Liang et al, 1♂, 600 m, 10.VIII.2010, leg. MR Zhang & SR Liu, slide No. SH20337, 1♂, 600 m, 10.VIII.2010, leg. YH Mou & SR Liu, slide No. SH20179.

Diagnosis. Nemophora chalybeella is similar to N. lapikella Kozlov, 1997 and N. biprocessa sp. nov. in the forewing pattern. It can be distinguished by having a dome-shaped uncus, which is triangular in N. biprocessa and subtriangular in N. lapikella . Nemophora chalybeella can be further distinguished from N. lapikella by the forewing without a black speckle at the base of the wing, and in the male genitalia by the ventral margin of the valva vertically straight from basal 1/4 to middle. In N. lapikella , the forewing has a black speckle between Sc and the anterior margin of the cell; in the male genitalia, the ventral margin of the valva is obliquely straight from basal 1/4 to middle. The differences between N. chalybeella and N. biprocessa are stated in the diagnosis of the latter species.

Description. Adult ( Figs 8, 9 ). Male wingspan 18.0−22.0 mm.

Head: Vertex yellow; frons purplish bronzy. Eye interocular index 0.43−0.47. Proboscis yellow. Labial palpus 1.2−1.7 × vertical eye diameter; first and second palpomeres yellow, with dark brown hairs; third palpomere dark brown. Antenna 3.2−3.6 × length of forewing; scape bronzy; flagellum yellowish brown except dark brown in basal 1/6.

Thorax: Mesonotum golden yellow; tegula bronzy. Forewing ground color brownish yellow from base to inner fascia, purplish bronzy from beyond outer fascia to apex; four silvery gray streaks, edged with black scales: first streak from base to near middle along costal margin, second streak from middle to distal 1/5 of cell along anterior margin, third streak from base to 3/4 of cell along posterior margin, fourth streak from near base to 2/5 of wing along 1A+2A; four black lines: first line from base to 2/5 of wing along R 1, second line from basal 1/4 to 3/5 of cell, third line from near base to beyond 2/5 of wing along CuP, fourth line from base to beyond middle along dorsum; inner and outer fasciae silvery gray, inner fascia slightly sinuate, outer fascia almost straight, medial fascia yellow, slightly sinuate or straight, edged with dark brown scales; brownish yellow fascia from near distal 1/4 of costal margin to beyond tornus, with six brownish yellow stripes radiating toward apex, edged with black scales; fringe brown. Hindwing grayish brown except light brown between costal margin and Rs; fringe brown. Foreleg yellow ventrally, purplish bronzy dorsally; midleg yellow except tibia purplish bronzy dorsally; hindleg yellow except tibia bronzy apically. Epiphysis dark brown, at middle of tibia, not reaching apex of tibia.

Abdomen: Dark brown.

Female wingspan 16.0−18.0 mm. Antenna same length as forewing, thickened by black scales up to basal 2/5, grayish white distally. Otherwise, similar to male.

Male genitalia ( Fig. 33 ). Socius ovoid, length 1.9 × width. Tegumen without median ridge. Uncus dome-shaped. Valva fused for basal 1/4, narrowly rounded at apex, straight on costal margin, obliquely straight except vertically straight from basal 1/4 to middle on ventral margin; sacculus reaching basal 1/4 of ventral margin. Transtilla with a triangular emargination anteromedially, with subtriangular processes anterolaterally; median process spiniform, reaching posterior 1/3 of tegumen apically. Vinculum 2.9 × length of valva, narrowly rounded anteriorly. Phallus 1.2 × length of vinculum, with a pair of sclerotized belts from distal 1/4 to near apex and spines from distal 2/7 to 1/10 ( Fig. 33a ). Juxta 0.47 × length of phallus; lateral arm 0.15 × length of arrow head.

Female genitalia ( Fig. 49 ). Apophyses posteriores slightly longer than apophyses anteriores; apophyses anteriores fused with eighth tergum in posterior 2/5, 2.1 × length of seventh tergum. Eighth tergum triangularly produced anteromedially. Antrum from near anterior margin to 1/4 of eighth sternum. Seventh tergum narrowly rounded posteriorly. Vestibulum weakly sclerotized. Ductus bursae 0.35 × length of vestibulum, 0.54 × length of corpus bursae. Corpus bursae elongate ovoid.

Distribution. China (Beijing, Gansu, Hebei, Henan, Liaoning, Ningxia, Shaanxi, Shanxi, Sichuan, Tianjin), Russia, South Korea.

Remarks. This species is recorded for the first time in China.

Figures

FIGURES 7‒12. Adults of Nemophora spp. 7, N. borealis sp. nov., holotype, ♂; 8, N. chalybeella, ♂; 9, N. chalybeella, ♀; 10, N. digitivalva sp. nov., holotype, ♂; 11, N. gaoligongshana sp. nov., holotype, ♂; 12, N. gaoligongshana sp. nov., paratype, ♀. Scales= 5.0 mm.

FIGURES 33‒38. Male genitalia of Nemophora spp. 33, N.chalybeella, slide No. SH20179; 34, N.digitivalva sp. nov., holotype, slide No. SH20019; 35, N. gaoligongshana sp. nov., holotype, slide No. SH20184; 36, N. japonica, slide No. SH20193; 37, N. karafutonis, slide No. SH20203; 38, N. lapikella, slide No. SH20181; 33a − 38a, enlarged distal part of phallus. Scales= 0.2 mm, 33a‒38a= 0.1 mm.

FIGURES 48‒50. Female genitalia of Nemophora spp. 48, N. amatella, slide No. SH20039; 49, N. chalybeella, slide No. SH20309; 50, N. gaoligongshana sp. nov., paratype, slide No. SH20323. Scales= 0.2 mm.