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.