Macroplea appendiculata ( Panzer, 1794 )

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 : 12

Macroplea appendiculata ( Panzer, 1794) .

( Figs 50 , 58 , 62, 66 , 70 , 76–78 , 90 )

Specimens examined. Total 37 specimens: 21 males and 11 females, “ China, Xinjiang, Altay, Fuyun County, a branch of Ertix River, 47.02459°N, 89.75198°E ”/ “ 1332 m, 2009.7.11, day, Zhiliang Wang coll. Institute of Zoology”/ “Adult host plant: Potamogeton oxyphyllus ”; 1 female, “Alsace, I. Maquin ded.”, “ Macroplea appendiculata Panz. M. Daccordi , det. 1986”; 1 female, “Boh. Heyn VODŇANY ”; 2 females, no collecting data, “ Haemonia appendiculata Panz. ”.

Distribution. China (Xinjiang), Siberia, Middle Asia, Europe, northern Africa ( Algeria).

Host plants. Ranunculus L. ( Ranunculaceae ), Carex L. ( Cyperaceae ), Potamogeton L. ( Potamogetonaceae ), Myriophyllum L. ( Haloragaceae ) and Sparganium L. ( Sparganiaceae ) ( Bieńkowski & Orlova-Bieńkowskaja, 2004). Potamogeton oxyphyllus Miq. is now recorded as adult host plant, as observed by the collector of this species, Zhiliang Wang.

Remarks. This is the first report of M. appendiculata from China (Xinjiang). Specimens were collected from upper stream of Ertix River ( Fig. 90 ).

In general, M. appendiculata differs from M. mutica by its longer spine at elytral outer apical angle, and second metatarsomere longer than first ( Medvedev, 2006). However, these characters were found to be highly variable. A few specimens of M. appendiculata from Xinjiang have relatively shorter spine, similar to those of M. mutica , and most specimens of M. mutica from Mongolia have second metatarsomere longer than first. Endophallic structures of the two species illustrated here are also similar ( Figs 77, 78 , 81–83 ). However, the shape of median lobe of aedeagus was found to be diagnostic and highly reliable in separating these two species. The median lobe of aedeagus is relatively robust with a denticle at apex in M. appendiculata ( Figs 77, 78 ), while the same in M. mutica is relatively slender and gradually narrowed towards apex ( Figs 79, 80 ) (also see Daccordi & Ruffo, 1978: Figs 2–5 ; Beenen & Winkelman, 1989: Figs 1–4 ; Medvedev, 2006: Figs 7, 8 ).

Figures

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 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 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 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 87 – 90. Habitat of Macroplea spp. 87. M. huaxiensis sp. nov. (Huaxi River); 88, 89. M. ranina sp. nov. (a pond at Keji Prairie). 90. M. appendiculata (upper stream of Ertix River).

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.

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 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).