Review of the degeerella species group of the genus Nemophora Hoffmannsegg 1798 (Lepidoptera: Adelidae) from China Author Sun, Hao 0000-0002-6483-7606 College of Life Sciences, Nankai University, Tianjin 300071, China Author Wang, Shuxia 0000-0002-9316-6661 College of Life Sciences, Nankai University, Tianjin 300071, China & shxwang @ nankai. edu. cn; https: // orcid. org / 0000 - 0002 - 9316 - 666 shxwang@nankai.edu.cn Author Li, Houhun 0000-0002-8953-3422 College of Life Sciences, Nankai University, Tianjin 300071, China & Key Laboratory of Biological Resources and Ecology of Pamirs Plateau in Xinjiang, Kashi 844000, China; College of Life and Geographic Sciences, Kashi University, Kashi 844000, China lihouhun @ nankai. edu. cn; https: // orcid. org / 0000 - 0002 - 8953 - 3422 Corresponding author lihouhun@nankai.edu.cn text Zootaxa 2022 2022-12-12 5219 4 301 338 journal article 207006 10.11646/zootaxa.5219.4.1 cc8e9625-cb63-48d5-90df-967bcbead638 1175-5326 7433926 234D6F6E-9EA6-404F-B2A1-1B07F2EF418E Key to species of the degeerella group in China based on external characters and male genitalia 1. Hindwing with a yellow spot at apex of CuA 2 ( Caradja 1927: 63 )..................................... N. syfaniella - Hindwing without yellow spot.......................................................................... 2 2. Forewing with fascia separated.......................................................................... 3 - Forewing with fascia not separated....................................................................... 4 3. Forewing with black dots beyond outer fascia posteriorly ( Fig. 22 )............................ N. seorsifascia sp. nov. - Forewing without black dot beyond outer fascia ( Caradja 1927: 64 ).................................. N. disjunctella 4. Forewing with V-shaped pattern from beyond outer fascia to apex.............................................. 5 - Forewing without V-shaped pattern from beyond outer fascia to apex............................................ 6 5. Forewing with a streak along anterior margin of cell curved apically ( Figs 20, 21 )............... N. recurvatifera sp. nov. - Forewing with a straight streak along anterior margin of cell ( Küppers 1980: 277 , fig. 78)............................................................................................................... N. ochsenheimerella 6. Forewing with four yellow stripes beyond middle of outer fascia ( Fig. 14 )............................. N. karafutonis - Forewing without yellow stripes beyond middle of outer fascia................................................ 7 7. Forewing with a distally forked stripe from beyond outer fascia to apex ( Fig. 5 )................ N. bifurcifascia sp. nov. - Forewing without forked stripe from beyond outer fascia to apex............................................... 8 8. Phallus with sclerotized belt............................................................................ 9 - Phallus without sclerotized belt......................................................................... 18 9. Juxta borne at middle of phallus, stalk swollen ( Fig. 46 )......................................... N. staudingerella - Juxta borne near apex of phallus, stalk not swollen......................................................... 10 10. Tegumen with plate.................................................................................. 11 - Tegumen without plate............................................................................... 14 11. Transtilla broad rectangular; uncus reniform ( Fig. 39 ).................................... N. latirectangula sp. nov. - Transtilla narrowly banded; uncus not reniform............................................................ 12 12. Valva fused for basal 1/4; phallus without denticles ( Fig. 35 )............................ N. gaoligongshana sp. nov. - Valva separated basally; phallus with denticles............................................................. 13 13. Valva rounded at apex, slightly sinuate on ventral margin ( Fig. 41 ).......................... N. purpuratifera sp. nov. - Valva pointed at apex, obliquely straight on ventral margin ( Fig. 32 )............................. N. borealis sp. nov. 14. Valva with three longitudinal ridges on ventral surface; phallus with two processes ( Fig. 47 )........... N. triuga sp. nov. - Valva without longitudinal ridge on ventral surface; phallus without process..................................... 15 15. Valva with two triangular processes at basal 1/3 on ventral margin; transtilla with median process short digitate ( Fig. 29 ).............................................................................................. N. augites - Valva without triangular processes on ventral margin; transtilla with median process not digitate..................... 16 16. Tegumen with a median ridge ( Fig. 38 ).......................................................... N. lapikella - Tegumen without median ridge......................................................................... 17 17. Valva obliquely straight from basal 1/4 to middle on ventral margin; vesica with belts of short spines ( Fig. 45 )............................................................................................ N. spinatibaltea sp. nov. - Valva vertically straight from basal 1/4 to middle on ventral margin; vesica without belts of short spines ( Fig. 33 )................................................................................................. N. chalybeella 18. Valva fused basally.................................................................................. 19 - Valva separated basally............................................................................... 23 19. Valva spatulate; vesica with two rows of spines ( Hirowatari 2005: 323 , fig. 8).......................... N. polychorda - Valva not spatulate; vesica without spines................................................................ 20 20. Uncus triangular.................................................................................... 21 - Uncus not triangular................................................................................. 22 21. Phallus with a banded and two equally narrow processes ( Fig. 31 )............................. N. biprocessa sp. nov. - Phallus without process ( Fig. 42 )....................................................... N. ravidifera sp. nov. 22. Phallus with a belt of short spines; sacculus subtriangular ( Fig. 40 )......................... N. parvaprocessa sp. nov. - Phallus without belt of short spines; sacculus not subtriangular ( Fig. 27 )................................ N. amatella 23. Vinculum produced posteromedially; sacculus rectangular ( Fig. 28 )......................... N. apiciprocessa sp. nov. - Vinculum not produced posteromedially; sacculus not rectangular............................................. 24 24. Sacculus reaching near apex of ventral margin; valva digitate ( Fig. 34 )......................... N. digitivalva sp. nov. - Sacculus reaching basal 1/5 of ventral margin; valva subtriangular ( Fig. 36 )............................. N. japonica