Eretmocera, Zeller, 1852

Lou, Kang, Yu, Dian, You, Wanxue & Li, Houhun, 2019, Taxonomic study of the genus Eretmocera Zeller, 1852 (Lepidoptera: Scythrididae) from China, with descriptions of three new species, Zootaxa 4624 (2), pp. 205-218 : 207

Key to the Chinese species of Eretmocera based on male genitalia

1. Saccus shorter than valva, tergum VIII broad tongue-shaped, posteriorly slightly narrower than anteriorly............... 2

- Saccus longer than valva, tergum VIII sub-rectangular, posteriorly distinctly narrower than anteriorly.................. 3

2. Forewing light blackish brown, with orange yellow spots; valva slightly arched and club-shaped, distal 1/5 slightly widened ( Fig. 8 ), sternum VIII posteriorly deeply notched to 1/3 ( Fig. 9 )............................ E. yingjiangensis sp. nov.

- Forewing blackish brown, with indistinct four greyish yellow spots; valva straight, almost parallelled laterally ( Fig. 13 ), sternum VIII posteriorly shallowly notched ( Fig. 14 )............................................... E. artemisiae sp. nov.

3. Forewing blackish brown, with four equally large orange yellow spots; metathorax ochreous yellow medially; saccus slightly longer than valva ( Fig. 10 ); tergum VIII shallowly notched ( Fig. 11 )........................... E. octopunctata sp. nov.

- Forewing dark copper brown, with four indistinct, light grey to greyish yellow spots; metathorax with a pair of ochreous yellow spots laterally; saccus 1.2 times length of valva ( Fig. 22 ); tergum VIII posteriorly truncated ( Fig. 23 )......... E. impactella

Figures

FIGURES 6−9. Morphology of Eretmocera spp. 6, antenna of E. octopunctata sp. nov.; 7, venation of E. artemisiae sp. nov., slide No. LK17094W; 8–9, male genitalia of E. yingjiangensis sp. nov.: 8, male genitalia, slide No. LK17082; 9. tergum VIII (up) and sternum VIII (down), slide No. LK17082. (Scale bars: 6,7 = 0.5 mm; 8,9 = 0.25 mm).

FIGURES 13−15. Genitalia of Eretmocera artemisiae sp. nov. 13, male genitalia, holotype, slide No. LK17201; 14, tergum VIII (up) and sternum (down), slide No. LK17054; 15, female genitalia, paratype, slide No. LK17206. (Scale bars = 0.25 mm).

FIGURES 10−12. Genitalia of Eretmocera octopunctata sp. nov. 10, male genitalia, holotype, slide No. LK17207; 11, tergum VIII (up) and sternum (down), slide No. LK17207; 12, female genitalia, paratype, slide No. LK17104. (Scale bars = 0.25 mm).

FIGURES 16−22. Habitats and behaviours of Eretmocera artemisiae sp. nov. 16−18, Habitats: 16, arid and semi-arid desert, 1461 m, Yanchi County, Ningxia Hui Autonomous Region; 17, mountains, 450 m, Ji County, Tianjin Municipality; 18, lowland, 15 m, suburb of Tianjin City; 19−22, adult behaviours: 19, visiting flowers of Heteropappus altaicus; 20, resting on Artemisia ordosica; 21, visiting flowers of Tamarix austromongolica; 22, visiting flowers of Astragalus melilotoides.

FIGURES 23−25. Genitalia of Eretmocera impactella (Walker). 23, male genitalia, slide No. LK17075; 24, tergum VIII (up) and sternum (down), slide No. LK17075; 25, female genitalia, slide No. LK17204. (Scale bars = 0.25 mm).