Argyresthia (Argyresthia) pygmaeella

Liu, Tengteng, Wang, Shuxia & Li, Houhun, 2017, Review of the genus Argyresthia Hübner, [1825] (Lepidoptera: Yponomeutoidea: Argyresthiidae) from China, with descriptions of forty-three new species, Zootaxa 4292 (1), pp. 1-135 : 54

43. Argyresthia (Argyresthia) pygmaeella ([Denis & Schiffermüller], 1775)

( Figs. 53, 54 , 121 , 177 , 233 , 279 )

Tinea pygmaeella [Denis & Schiffermüller], 1775:141. TL: [Austria], Vienna district. Tinea rudolphella Esper, 1791: 43 .

Tinea semifasciella Haworth : Stephens, 1835: 252.

Argyrosetia [sic] semifasciella (Haworth) : Stephens, 1829: 205. Argyresthia pygmaeella ([Denis & Schiffermüller]): Hübner, 1825: 422. Argyresthia pygmaeella (Hübner) : Stainton, 1854: 187.

Description. Adult ( Figs. 53, 54 ) wingspan 12.0̄ 15.5 mm. Forewing with two different patterns: one with several golden dots on costa, with dense golden spots below basal 2/3 of costa, dorsal fascia slightly narrowed anteriorly, reaching distal 2/3 of costa, distal 1/3 of wing suffused with golden dots, tornus with a golden dot extending to apex ( Fig. 53 ); the other with ground color silvery grayish white, dorsal fascia from before middle of wing, wide on basal 1/3, narrower on distal 2/3, reaching before distal end of cell, tornus with a golden dot not extended ( Fig. 54 ).

Male genitalia: As in Figs. 121 , 177 and 233 .

Female genitalia: As in Fig. 279 .

Material examined. Xinjiang Uygur Autonomous Region: 19Ƌ, 38♀ (1 ex. without abdomen), Hemu Village (47.71°N, 86.87°E), Buerjin County, 1114 m, 21̄ 24.vii.2007, leg. Xinpu Wang, slide nos. LTT12054Ƌ, LTT12088 ♂, LTT12722 ♂, LTT12723 ♀, LTT12054W, LTT1302W ; 1♂, 3♀, Buerjin (47.71°N, 86.87°E), 504 m, 21, 28.vii.2007, leg. Xinpu Wang ; 24♂ (3 exs. without abdomen), 37♀ (2 exs. without abdomen), Baihaba Village (48.53°N, 86.71°E), Habahe County, 1264 m, 27.vii.2007, leg. Xinpu Wang, slide nos. LTT12039Ƌ, LTT12040 ♀, LTT12093 ♀, LTT12724 ♀ ; 2♂, 4♀, Kanasi (48.50°N, 87.10°E), Buerjin , 1407 m, 25̄ 26.vii.2007, leg. Xinpu Wang, slide no. LTT12092 ♂ ; 1♀, Balian (43.59°N, 82.07°E), Mohe Town , Kongliu County, 1206 m, 5.viii.2007, leg. Xinpu Wang ; 1♀, Nalati (43.31°N, 84.17°E), Xinyuan , 1562 m, 7.viii.2007, Xinpu Wang ; Gansu Province: 1Ƌ, Mt. Xinglong , Yuzhong County (35.80°N, 104.07°E), 2120 m, 30.vii.1993, leg. Houhun Li, slide no. LTT12726.

Host plants: Salix capera Linn. and Salix spp. ( Salicaceae ) ( Friese 1969, Agassiz 1996).

Distribution. China (Gansu, Xinjiang), Europe, Russia, America, Canada.

Diagnosis. Argyresthia (A.) pygmaeella superficially resembles A. (A.) brockeella (Hübner, [1805]); the two share a forewing with golden streaks. The two species differ remarkably in features of the male genitalia: A. (A.) pygmaeella has a subrectangular valva, a subtriangular saccus obtuse apically, and coremata ( Fig. 121 ); A. (A.) brockeella has a subovate valva narrowed at the base and widened towards the apex, a band-shaped saccus nearly uniform in width, and lacks coremata ( Fig. 122 ).

Figures

FIGURES 52 – 59. Adults of Argyresthia spp. 52, A. (Argyresthia) subzonata, sp. nov., ♀, paratype; 53, A. (A.) pygmaeella ([Denis & Schiffermüller]), ♀; 54, A. (A.) pygmaeella ([Denis & Schiffermüller]), ♀; 55, A. (A.) brockeella (Hübner), collected from Shanxi Province, ♀; 56, A. (A.) brockeella (Hübner), collected from Xizang, ♀; 57, A. (A.) ivella (Haworth), ♀; 58, A. (A.) basistriata, sp. nov., ♀, paratype; 59, A. (A.) retinella Zeller, ♀. (Scales = 2.0 mm)

FIGURES 120 – 125. Eighth sternite and male genitalia excluding phallus of Argyresthia spp. 120, A. (Argyresthia) subzonata, sp. nov., slide no. LTT 12338, holotype; 121, A. (A.) pygmaeella ([Denis & Schiffermüller]), slide no. LTT 12722; 122, A. (A.) brockeella (Hübner), slide no. LTT 12548; 123, A. (A.) ivella (Haworth), slide no. LTT 12270; 124, A. (A.) basistriata, sp. nov., slide no. LTT 12271, paratype; 125, A. (A.) retinella Zeller, slide no. LTT 12717. (Scales = 0.2 mm)

FIGURES 174 – 177. Phallus of Argyresthia spp. 174, A. (Argyresthia) aphoristis Meyrick, slide no. LTT 12348; 175, A. (A.) triangulata, sp. nov., slide no. LTT 12362, paratype; 176, A. (A.) subzonata, sp. nov., slide no. LTT 12338, holotype; 177, A. (A.) pygmaeella ([Denis & Schiffermüller]), slide no. LTT 12722. (Scales = 0.2 mm)

FIGURES 233 – 244. Socii of Argyresthia spp. 233, A. (Argyresthia) pygmaeella ([Denis & Schiffermüller]), slide no. LTT 12722; 234, A. (A.) brockeella (Hübner), slide no. LTT 12548; 235, A. (A.) ivella (Haworth), slide no. LTT 12270; 236, A. (A.) basistriata, sp. nov., slide no. LTT 12271, paratype; 237, A. (A.) retinella Zeller, slide no. LTT 12717; 238, A. (A.) longalbella, sp. nov., slide no. LTT 12274, paratype; 239, A. (A.) umbrina, sp. nov., slide no. LTT 12546, paratype; 240, A. (A.) umbrinistrigata, sp. nov., slide no. LTT 12526, paratype; 241, A. (A.) angusta Moriuti, slide no. LTT 12289; 242, A. (A.) surrecta, sp. nov., slide no. LTT 12357, paratype; 243, A. (A.) lanosa, sp. nov., slide no. LTT 12664, paratype; 244, A. (A.) lata, sp. nov., slide no. LTT 12279, paratype. (Scales = 0.1 mm)

FIGURES 277 – 279. Female genitalia of Argyresthia spp. 277, A. (Argyresthia) triangulata, sp. nov., slide no. LTT 12091, paratype; 278, A. (A.) subzonata, sp. nov., slide no. LTT 12339, paratype; 279, A. (A.) pygmaeella ([Denis & Schiffermüller]), slide no. LTT 12724. (Scales = 0.5 mm)