Phalaena degeerella Linnaeus 1758

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
Published as part of Sun, Hao, Wang, Shuxia & Li, Houhun, 2022, Review of the degeerella species group of the genus Nemophora Hoffmannsegg 1798 (Lepidoptera: Adelidae) from China, pp. 301-338 in Zootaxa 5219 (4) on pages 303-304, DOI: 10.11646/zootaxa.5219.4.1, http://zenodo.org/record/7433926
{"references":["Caradja, A. (1927) Die kleinfalter der stotzner'schen ausbeute nebst zutrage aus meiner sammlung (Zweite biogeographische skizze: \" Zentralasien \"). Academia Romana Memoriile Sectiunii Stiintifice, 4 (8), 361 - 428.","Kuppers, P. V. (1980) Untersuchungen zur taxonomie und phylogenie der Westpalaarktischen Adelinae (Lepidoptera: Adelinae). Verlag M. Wahl, Karlsruhe, 497 pp.","Hirowatari, T. (2005) The genus Nemophora Hoffmannsegg, 1798 (Lepidoptera, Adelidae) from the Ryukyus. Transactions of the Lepidopterological Society of Japan, 56 (4), 311 - 329."]}