Key to species of Ypsolopha mucronella -group based on female genitalia

(exclusive of Y. costibasella, Y. nigrofasciata and Y. capitalba sp. nov.)

1. Lamella postvaginalis V-shaped......................................................................... 2

- Lamella postvaginalis not V-shaped..................................................................... 10

2. Ductus bursae shorter than corpus bursae.................................................................. 3

- Ductus bursae longer than corpus bursae.................................................................. 6

3. Corpus bursae sack-shaped (Fig. 180)........................................................... Y. albistriata

- Corpus bursae not sack-shaped......................................................................... 4

4. Ductus bursae membranous, dilated near corpus bursae (Fig. 181)....................................... Y. strigosa

- Ductus bursae sclerotized on anterior half, not dilated near corpus bursae........................................ 5

5. Ductus bursae granulous near corpus bursae (Fig. 197)................................................. Y. diana

- Ductus bursae granulous on posterior half, smooth on anterior half (Fig. 182)................... Y. paristrigosa sp. nov.

6. Ductus bursae slightly longer than corpus bursae........................................................... 7

- Ductus bursae more than 1.2 times length of corpus bursae................................................... 8

7. Intersegmental membrane between papilla analis and 8th abdominal segment 1/2 length of abdomen, apophyses posteriores twice length of apophyses anteriores (Fig. 192)................................................ Y. aurea sp. nov.

- Intersegmental membrane between papilla analis and 8th abdominal segment 3/5 length of abdomen, apophyses posteriores 2.5 times length of apophyses anteriores (Fig. 196)............................................ Y. bisticta sp. nov.

8. Signum 1/2 length of corpus bursae, ridged at anterior 1/5 (Fig. 190).................................... Y. falcella

- Signum 2/5 length of corpus bursae, ridged at anterior 1/3.................................................... 9

9. Intersegmental membrane between papilla analis and 8th abdominal segment 2/5 length of abdomen (Fig. 188).............................................................................................. Y. varidentella sp. nov.

- Intersegmental membrane between papilla analis and 8th abdominal segment 1/2 length of abdomen (Fig. 187).... Y. ulingensis

10. Lamella postvaginalis U-shaped (Fig. 185).................................................. Y. umbrina sp. nov.

- Lamella postvaginalis not U-shaped.................................................................... 11

11. Lamella postvaginalis composed of two sclerotized bands................................................... 12

- Lamella postvaginalis not composed of two sclerotized bands................................................ 16

12. Ductus bursae longer than 1.5 times of corpus bursae....................................................... 13

- Ductus bursae shorter than 1.5 times of corpus bursae...................................................... 14

13. Apophyses posteriores 2.5 times length of apophyses anteriores, ductus bursae dilated near corpus bursae (Fig. 183)... Y. longa

- Apophyses posteriores twice length of apophyses anteriores, ductus bursae not dilated (Fig. 186).............. Y. dentella

14. Two bands of lamella postvaginalis nearly parallel-sided.................................................... 15

- Two bands of lamella postvaginalis intilted basally (Fig. 193)......................................... Y. blandella

15. Signum 1/2 length of corpus bursae (Fig. 189)...................................................... Y. yasudai

- Signum 1/3 length of corpus bursae (Fig. 195).................................................... Y. nemorella

16. Intersegmental membrane between papilla analis and 8th abdominal segment 7/10 length of abdomen................ 17

- Intersegmental membrane between papilla analis and 8th abdominal segment 1/2 length of abdomen (Fig. 191)................................................................................................. Y. triangula sp. nov.

17. Corpus bursae irregularly long ovate, narrowed at middle (Fig. 184)....................................... Y. saitoi

- Corpus bursae nearly rounded (Fig. 194).................................................... Y. chlorina sp. nov.