Macroplea

Lou, Qiaozhe, Yu, Peiyu & Liang, Hongbin, 2011, Two new species of Macroplea Samouelle (Coleoptera: Chrysomelidae: Donaciinae) from China, with a key to all known species, Zootaxa 3003, pp. 1-21 : 3

Key to species of Macroplea

1 Punctures along elytral striae coarse, not arranged in paired rows ( Figs 24, 26 , 31 ); antenna relatively short, not extending beyond middle of elytron ( Figs 24–27 ); metatarsus with apical tarsomere as long as basal three combined ( Fig. 39 ); hypomeron with an oblong supracoxal pubescent patch ( Fig. 32 ); BL = 5.4–8.5 mm. China (Sichuan).............. M. ranina sp. nov.

- Punctures along elytral striae fine, arranged more or less in paired rows ( Figs 1, 3 , 50–53 ); antenna relatively long, extending beyond middle of elytron ( Figs 1–3 , 50, 52, 53 ); metatarsus with apical tarsomere more than 1.2 times as long as basal three combined ( Figs 10 , 68, 70, 71 ); hypomeron with at most a small triangular supracoxal pubescent patch ( Figs 14 , 54 )....... 2

2 Pronotum and elytron pubescent, with conspicuous dense long hairs ( Figs 57 , 61 ); elytron without spine at outer apical angle ( Fig. 65 ); pronotum without black spots or stripes on disc ( Fig. 57 ); BL: 5.0–8.6 mm. China (Heilongjiang, Ningxia, Gansu, Xinjiang (Aksu)); Finland........................................................ M. pubipennis ( Reuter, 1875)

- Pronotum and elytron glabrous or with very sparse short hairs ( Figs 5, 8 , 56, 58, 59 , 60, 62, 63 ); elytron with spine at outer apical angle ( Figs 12 , 64, 66, 67 ); pronotum with black spots or stripes on disc ( Figs 5 , 56, 58, 59 )........................ 3

3 Pronotum without coarse black punctures near apical and basal margin, medial longitudinal groove shallow, not black ( Figs 58, 59 ); hypomeron without supracoxal pubescent patch; second metatarsomere longer than or equal to first ( Figs 70, 71 )...... 4

- Pronotum with coarse black punctures near apical and basal margin, medial longitudinal groove deep, black ( Figs 5 , 56 ); hypomeron with a small triangular supracoxal pubescent patch ( Figs 14 , 54 ); first metatarsomere much longer than second ( Figs 10 , 68 )......................................................................................... 5

4 Median lobe of aedeagus relatively robust, apex with a denticle ( Figs 77, 78 ); elytral outer apical spine generally long, with base narrow ( Fig. 66 ); seond metatarsomere longer than first ( Fig. 70 ); body relatively large, BL: 5.9–7.7 mm. China (Xinjiang (Altay)); Siberia; Middle Asia; Europe; Algeria..................................... M. appendiculata ( Panzer, 1794)

- Median lobe of aedeagus relatively slender, apex gradually narrowed ( Figs 79, 80 ); elytral outer apical spine generally short, with base broad ( Fig. 67 ); second metatarsomere equal to or slightly longer than first ( Fig. 71 ); body relatively small, BL: 5.3–6.6 mm. China (Heilongjiang, Tianjin); Japan; Siberia; Mongolia; Middle Asia; Europe.... M. mutica ( Fabricius, 1792)

5 Pronotum and elytron smooth, without wrinkles ( Figs 56 , 60 ); lateral outline of elytra nearly parallel ( Fig. 52 ); vertical tubercles distinctly convex ( Figs 54, 55 ); black stripes on pronotal disc short ( Fig. 56 ); body relatively small, BL: 3.5–4.5 mm. China (Heilongjiang, Hebei, Jiangsu, Hubei); Japan; East Siberia............................ M. japana ( Jacoby, 1885)

- Pronotum and elytron with wrinkles ( Figs 5, 8 ); lateral outline of elytra not parallel, widest near middle ( Figs 1, 3 ); vertical tubercles less convex ( Figs 6, 7 ); black stripes on pronotal disc long ( Fig. 5 ); body relatively large, BL: 5.1–6.4 mm. China (Guizhou).......................................................................... M. huaxiensis sp. nov.

Figures

FIGURES 24 – 27. Macroplea ranina sp. nov. 24. Paratype, male, dorsal view; 25. Paratype, male, ventral view; 26. Paratype, female, dorsal view; 27. Paratype, female, ventral view. Scale line = 5.0 mm.

FIGURES 28 – 43. Macroplea ranina sp. nov. 28 – 35, 38 – 41. Male; 36, 37, 42, 43. Female. 28. Pronotum, dorsal view; 29. Head, dorsal view; 30. Mouth parts, ventral view; 31. Left elytron, middle part; 32. Head and prothorax, left lateral view; 33. Antenna; 34. Part of abdominal sternum, showing long setae; 35. Apex of left elytron; 36. Left profemur, ventral view; 37, 38. Right metatibia, lateral view; 39. Right metatarsus, lateral view; 40, 42. Apical abdominal sternum; 41, 43. Pygidium. Scale lines: d = 0.5 mm. (Figs 28, 29, 31 – 33, 35 – 43); e = 0.5 mm. (Figs 30, 34).

FIGURES 1 – 4. Macroplea huaxiensis sp. nov. 1. Holotype, male, dorsal view; 2. Paratype, male, ventral view; 3. Paratype, female, dorsal view; 4. Paratype, female, ventral view. Scale line = 5.0 mm.

FIGURES 50 – 53. Macraplea spp. 50. M. appendiculata from Xinjiang, male; 51. M. pubipennis from Ningxia, female; 52. M. japana from Jiangsu, female; 53. M. mutica from Tianjin, female. Scale lines = 5.0 mm.

FIGURES 5 – 20. Macroplea huaxiensis sp. nov. 5 – 13, 17, 18. Male; 14 – 16, 19, 20. Female. 5. Pronotum, dorsal view; 6. Head, dorsal view; 7. Head, lateral view; 8. Left elytron, middle part; 9. Right metatibia, lateral view; 10. Right metatarsus, lateral view; 11. Mouth parts, ventral view; 12. Apex of left elytron; 13. Antenna; 14. Pronotum, left lateral view; 15. Right metatibia, lateral view; 16. Left profemur, ventral view; 17, 19. Apical abdominal sternum; 18, 20. Pygidium. Scale lines: a = 0.5 mm. (Figs 5 – 10, 12, 14 – 20); b = 1.0 mm. (Fig. 13); c = 0.5 mm. (Fig. 11).

FIGURES 68 – 71. Tarsus of Macroplea spp. 68. M. japana from Jiangsu; 69. M. pubipennis from Ningxia; 70. M. appendiculata from Xinjiang; 71. M. mutica from Tianjin. 68, 70, 71. Right metatarsus; 69. Left protarsus. Scale lines = 0.5 mm

FIGURES 54 – 59. Head, prothorax and pronotum of Macroplea spp. 54 – 56. M. japana from Jiangsu; 57. M. pubipennis from Ningxia; 58. M. appendiculata from Xinjiang; 59. M. mutica from Tianjin; 54. Head and prothorax, lateral view; 55. Vertex, dorsal view; 56 – 59. Pronotum, dorsal view. Scale lines = 0.5 mm.

FIGURES 60 – 67. Elytron of Macroplea spp. 60, 64. M. japana from Jiangsu; 61, 65. M. pubipennis from Ningxia; 62, 66. M. appendiculata from Xinjiang; 63, 67. M. mutica from Tianjin. 60 – 63. Left elytron, middle part; 64, 66, 67. Apex of left elytron; 65. Apexes of both elytra. Scale lines = 0.2 mm.

FIGURES 76 – 78. Macroplea appendiculata from Xinjiang. 76. Tegmen, dorsal view; 77, 78. Median lobe with endophallus in it (77. Dorsal view; 78. Lateral view). Scale line = 0.5 mm.

FIGURES 79 – 84. Macroplea mutica from Tianjin. 79, 80. Median lobe without endophallus in it (79. Dorsal view; 80. Lateral view); 84. Tegmen, dorsal view; 81 – 83. Endophallus (81. Lateral view; 82. Dorsal review; 83. Ventral review). Scale line = 0.5 mm.