Thecobathra, Meyrick, 1922

Liu, Haoyu & Wang, Shuxia, 2023, Taxonomic study of the genus Thecobathra Meyrick (Lepidoptera: Yponomeutidae) in China, with descriptions of eight new species, Zootaxa 5325 (4), pp. 483-508 : 484-485

Key to species of Thecobathra in China based on male genitalia

(excluding T. argophanes and T. heppneri )

1. Aedeagus with one row of teeth......................................................................... 2

- Aedeagus with two rows of teeth....................................................................... 11

2. Aedeagus shorter than saccus or as long as saccus........................................................... 3

- Aedeagus longer than saccus............................................................................ 5

3. Aedeagus shorter than saccus ( Fan et al. 2008: 18, fig. 10)........................................ T. longisaccata

- Aedeagus as long as saccus............................................................................. 4

4. Ventral plate of gnathos spinous ( Fan et al. 2008: 21, fig. 14).................................... T. badagongshana

- Ventral plate of gnathos not spinous ( Moriuti 1965: 8, fig. 3).......................................... T. yasudai

5. Ventral plate of gnathos densely setose ( Fig. 21 )............................................. T. setulosa sp. nov.

- Ventral plate of gnathos not setose....................................................................... 6

6. Proximal process of valva with a long, curved spine ( Fan et al. 2008: 18, fig. 11).......................... T. latibasis

- Proximal process of valva without a spine................................................................. 7

7. Sacculus with a dorsoapical thorn ( Moriuti 1971: 233, fig. 2)............................................ T. casta

- Sacculus without a dorsoapical thorn..................................................................... 8

8. Valva without a basal plate ( Sohn 2018: 377, fig. 18).............................................. T. pauciguttata

- Valva with a basal plate................................................................................ 9

9. Juxta present ( Moriuti 1971: 233, fig. 1)......................................................... T. acropercna

- Juxta absent........................................................................................ 10

10. Aedeagus with initial two teeth obviously larger than other teeth ( Fig. 14 ).................... T. magnidentalis sp. nov.

- Aedeagus with all teeth nearly equal in size ( Fig. 12 )......................................... T. cuneata sp. nov.

11. Costa with a protuberance............................................................................. 12

- Costa without a protuberance.......................................................................... 21

12. Dorsoproximal process of valva with a spine.............................................................. 13

- Dorsoproximal process of valva without a spine........................................................... 14

13. Dorsoproximal process of valva with a long spine extending inward and curved at distal 1/3 ( Fig. 19 )................................................................................................... T. paritetragona sp. nov.

- Dorsoproximal process of valva with a short straight spine ( Liu 1983: 80, fig. 1).......................... T. tetragona

14. Dorsoproximal process of valva with a sclerotized triangular area ventrally ( Liu 1983: 81, fig. 2).............. T. chiona

- Dorsoproximal process of valva without a sclerotized triangular area........................................... 15

15. Valva with a basal plate ( Moriuti 1963: 221, fig. 19)................................................... T. kappa

- Valva without a basal plate............................................................................ 16

16. Sacculus longer than half length of valva ( Fan et al. 2008: 18, fig. 9)................................... T. partinuda

- Sacculus shorter than half length of valva................................................................. 17

17. Aedeagus with teeth from middle to apex ( Moriuti 1963: 220, fig. 16)....................................... T. eta

- Aedeagus with teeth from beyond middle to apex.......................................................... 18

18. Dorsoproximal process of valva without a fold ( Yu et Li 2001: 119, fig. 1)................................. T. flavida

- Dorsoproximal process of valva with a fold running along its ventral margin and then along dorsal margin of sacculus.... 19

19. Aedeagus with two rows of teeth equal in length ( Moriuti 1971: 242, fig. 10)............................ T. sororiata

- Aedeagus with two rows of teeth unequal in length......................................................... 20

20. Aedeagus with tooth at basal 1/3 obviously larger than other teeth ( Moriuti 1965: 9, fig. 4).................... T. nakaoi

- Aedeagus with all teeth nearly equal in size ( Moriuti 1971: 242, fig. 11)................................... T. delias

21. Ventral plate of gnathos with a pair of crescent-shaped anterior processes ( Fig. 15 )................. T. meniscata sp. nov.

- Ventral plate of gnathos without paired crescent-shaped anterior processes...................................... 22

22. Socius with a row of combteeth ( Fig. 20 )................................................. T. pectinacea sp. nov.

- Socius without combteeth............................................................................. 23

23. Sacculus with sclerotized band along dorsal and ventral margins ( Fig. 16 )............................ T. microsignata

- Sacculus without sclerotized band....................................................................... 24

24. Sacculus with a hairy lobe at base ( Fan et al. 2008: 18, fig. 8)........................................ T. basilobata

- Sacculus without a lobe at base......................................................................... 25

25. Sacculus concave on ventral margin..................................................................... 26

- Sacculus not concave on ventral margin.................................................................. 27

26. Valva with a tooth on ventral margin ( Fan et al. 2008: 21, fig. 13)...................................... T. paranas

- Valva without a tooth on ventral margin ( Friese 1960: 37, fig. 13)......................................... T. anas

27. Sacculus subrectangular, with a ventroapical process........................................................ 28

- Sacculus not subrectangular, without a ventroapical process.................................................. 29

28. Subscaphium narrowed toward apex ( Fig. 17 ).......................................... T. minutiprocessa sp. nov.

- Subscaphium parallel sided to apex ( Liu 1984: 324, fig. 1)............................................ T. yunnana

29. Sacculus oval ( Liu 1980: 37, fig. 3)................................................................ T. ovata

- Sacculus not oval.................................................................................... 30

30. Valva dilated in distal half............................................................................. 31

- Valva not dilated in distal half.......................................................................... 32

31. Socius with a process on inner margin ( Fig. 18 )............................................ T. odontoidea sp. nov.

- Socius without a process on inner margin ( Fig. 13 )................................................... T. lambda

32. Aedeagus with two large teeth at basal 1/3 ( Liu 1980: 38, fig. 4)....................................... T. bidentata

- Aedeagus without tooth near base....................................................................... 33

33. Socius with outer margin obtusely produced between middle and distal 1/4 ( Fan et al. 2008: 21, fig. 12)...... T. acrivalvata

- Socius subparallel-sided in basal 3/4 and narrowed from distal 1/4 to apex ( Fig. 11 )......................... T. albana

Figures

FIGURES 19–21. Male genitalia of Thecobathra spp. 19, T. paritetragona sp. nov., holotype, slide No. LHY21720; 20, T. pectinacea sp. nov., holotype, slide No. LHY21060; 21, T. setulosa sp. nov., holotype, slide No. LHY21044. Scales = 0.5 mm.

FIGURES 11–14. Male genitalia of Thecobathra spp. 11, T. albana, slide No. LHY21419; 12, T. cuneata sp. nov., holotype, slide No. LHY21706; 13, T. lambda, slide No. LHY21452; 14, T. magnidentalis sp. nov., holotype, slide No. YHL00384. Scales = 0.5 mm.

FIGURES 15–18. Male genitalia of Thecobathra spp. 15, T. meniscata sp. nov., holotype, slide No. LHY21528; 16, T. microsignata, slide No. LHY21734; 17, T. minutiprocessa sp. nov., holotype, slide No. LHY21667; 18, T. odontoidea sp. nov., holotype, slide No. LHY21068. Scales = 0.5 mm.