Monolepta pallidula

Lee, Chi-Feng, 2009, A taxonomic revision of Monolepta pallidula species group in Taiwan (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 2170, pp. 15-27 : 26

Key to Monolepta pallidula species group from Taiwan

1. Antenna wider ( Figs. 29 , 35 ), antennomeres 4–10 about 4.0 times longer than broad at apex; black lateral margin of elytron abbreviated near apex ....................................................................................................................................... 2

- Antenna slender ( Figs. 13 , 26 ), antennomeres 4–10 about 5.5–6.2 times longer than broad at apex; body color variable, elytron entirely yellowish-brown ( Fig. 1 ), or yellowish-brown and with black lateral margin ( Figs. 2–4 ), or entirely black ( Figs. 5–6 ) ............................................................................................................................................ 3

2. Black lateral margin of elytra from base to basal 2/5 ( Figs. 7–8 ); lateral margin of median lobe not extending posterior in middle, without a deep groove at middle in ventral view .... ......................................... M. sauteri Chûjô, 1935

- Black lateral margin of elytra from base to basal 4/5 ( Figs. 9–10 ); median lobe extending posterior at middle, with a deep groove at middle in ventral view ................................................................................. M. kuroheri Kimoto, 1966

3. Tibia yellowish-brown ( Figs. 1–2 ) ...................................................................................... M. gracilipes Chûjô, 1938

- Tibia black or blackish-brown ( Figs. 3–6 )........................................................................... M. tsoui Lee , new species

Figures

FIGURES 27 – 32. Monolepta sauteri Chûjô. 27. Median lobe, a: dorsal (ventral endophallic spiculae omitted), b: lateral, c: ventral (dorsal and median endophallic spiculae omitted); dsp: dorsal endophallic spiculae, msp: median endophallic spiculae, vsp: ventral endophallic spiculae; 28. basal antennomeres; 29. antenna; 30. spermatheca; 31. dorsal bursasclerites, a: inner, b: lateral; 32. ventral bursa-sclerites, a: inner, b: lateral.

FIGURES 33 – 38. Monolepta kuroheri Kimoto. 33. Median lobe, a: dorsal (ventral endophallic spiculae omitted), b: lateral, c: ventral median endophallic spiculae omitted); dsp: dorsal endophallic spiculae, vsp: ventral endophallic spiculae; 34. basal antennomeres; 35. antenna; 36. spermatheca; 37. two different dorsal bursa-sclerites, 38. ventral bursa-sclerites.

FIGURES 11 – 16. Monolepta gracilipes Chûjô. 11. Median lobe, a: dorsal (ventral endophallic spiculae omitted), b: lateral, c: ventral (apical, median, and lateral endophallic spiculae omitted); asp: apical endophallic spiculae, lsp: lateral endophallic spiculae, msp: median endophallic spiculae, vsp: ventral endophallic spiculae; 12. basal antennomeres; 13. antenna; 14. spermatheca; 15. dorsal bursa-sclerites; 16. ventral bursa-sclerites.

FIGURES 21 – 26. Monolepta tsoui new species. 21. Median lobe, a: dorsal (ventral endophallic spiculae omitted), b: lateral, c: ventral (median and lateral endophallic spiculae omitted); lsp: lateral endophallic spiculae, msp: median endophallic spiculae, vsp: ventral endophallic spiculae; 22. spermatheca; 23. dorsal bursa-sclerites; 24. ventral bursasclerites; 25. basal antennomeres; 26. antenna.

FIGURES 1 – 10. Color forms in Monolepta species. 1 – 2. M. gracilipes, dorsal; 3 – 6. M. tsoui, 3, 5 – 6: dorsal, 4: lateral; 7 – 8. M. sauteri, 7: dorsal, 8: lateral; 9 – 10. M. kuroheri, 9: dorsal, 10: lateral.