Caryopemon giganteus Pic, 1909

Li, You, Omar, Youssef Mohamed & Zhang, Runzhi, 2016, Taxonomic studies on the genus Caryopemon (Coleoptera: Chrysomelidae: Bruchinae) of China and Myanmar with some new host plants, Florida Entomologist 99 (2), pp. 257-263 : 259-262

Caryopemon giganteus Pic, 1909 ( Figs. 15–24 )

Caryopemon giganteus Pic, 1909:34 .— Type locality: China.

Protocaryopemon archetypus Borowiec, 1987:54 .— Type locality: North India.

MATERIAL EXAMINED

7 female, 3 male, Kunming , Yunnan Province, China. 24.90°N, 102.83°E, alt. 1,900 m, 8-VI-1955, Kryzhanovsky leg [IOZ(E)1045387-1045396, 1045412] ; 5 female, 2 male, Yuanjiang County, Yunnan Province, China. 23.48°N, 102.94°E, alt. 500 m, 12-V-1957 Liang Qiuzhen [IOZ(E)1045404-1045410] ; 1 male, Yuanjiang County , Yunnan Province, China. 23.38°N, 103.35°E, alt. 540 m, 16-V-1957, Liu Dahua [IOZ(E)1045403] ; 2 female, Puer City , Yunnan Province, China. 22.49°N, 100.97°E, alt. 850 m, 2-V-1957, Zang Lingchao [IOZ(E)1045398-1045399] ; 1 male, Nujiang River , Yunnan Province, China. 25.85°N, 98.85°E, alt. 800 m, 11-V-1955, Xue Zifeng [IOZ(E)1045397] ; 1 female, Dali City , Yunnan Province, China. 25.69°N, 100.14°E, 30-V-1955, Yang Xinchi [IOZ(E)1045413] ; 1 male, Cheli Village, Yunnan Province, China. 23.09°N, 102.17°E, alt. 580 m, 30-VI-1955, Ou Bingrong [IOZ(E)1045411] ; 1 female, Menga Village , Yunnan Province, China. 22.18°N, 100.33°E, alt. 800 m, 30-X-1958, Wang Shuyong [IOZ(E)1045414] ; 1 male, Lashio , Myanmer. 22.94°N, 97.74°E, alt. 860 m, 8-VI-2013, Jiang Kaiwen .

DIAGNOSIS

Dimension. Body length (pronotum–elytra): 8.1–12.0 mm; width 4.7–6.0 mm (body size depends on size of host seed).

Color. Integument black, sometimes reddish at apex of antennae, vestiture gray and brown, dense, conspicuous, especially on ventral segments ( Figs. 15 and 16 ). Pronotum with 3 gray stripes medially and laterally. Elytra with gray vertical striae, sometimes widened at middle. Hind femur with 2 glabrous spots on dorsum.

Head elongate; frontal carina present. Eyes rather flat, emarginate to 2/5 length of eye. Antennal articles: 5–11 pectinate. Pronotum subtrapezoidal, greatest width at base (W/L = 1.27), sides almost straight ( Fig. 15 ). Metasternal process strongly convex in lateral view. Elytra about 1.23 times longer than wide. Last 2 tergites (including pygidium) exposed behind elytra. Last sternite emarginate up to base in male, not emarginate in female. Hind femur strongly incrassate; dorsal side of hind femur granulate and with 1 large, sharp spine with 5–7 gradually smaller, blunt denticles following ( Fig. 17 ).

Male genitalia. Median lobe elongate ( Fig. 20 ), apex ogival ( Fig. 22 ), bent ventrad; middle of internal sac lined with minute denticles ( Fig. 21 ); lateral lobes fused into gutter-like structure; apex of lateral lobes distinctly concave in middle ( Fig. 18 ); apex of gutter-like structure covered with many setae ( Fig. 19 ).

Female genitalia. Ovipositor 2 times longer than wide, weakly sclerotized ( Fig. 23 ). Stylus with 2 short setae ( Fig. 24 ). First pair of baculum elongate almost 2 times longer than 2nd pair ( Fig. 23 ). Apodeme of spiculum gastrale extending to apex of genitalia. Plate of spiculum gastrale as long as apodeme. Apex of ovipositor with 2 protuberances ( Fig. 24 ). Spermatheca C-shaped ( Fig. 8 ).

DISTRIBUTION

China (Yunnan), Myanmar ( Fig. 25 ), and Nepal.

HOST

Mucuna interrupta Gagnepain , Mucuna macrocarpa Wallich , Mucuna sp. (Fig. 26).

Figures

Figs.15–24. Caryopemon giganteus; 15, dorsal view;16,ventral view;17, hind femur;18, lateral lobes,ventral view; 19,setae on the lateral lobe; 20, median lobe, dorsal view; 21, minute denticles in the middle of internal sac, 22; median lobe, lateral view; 23, ovipositor; 24, apex of ovipositor. Scale bars = 1 mm.

Figs.1–8. Caryopemon hieroglyphicus; 1, dorsal view; 2, ventral view;3, hind femur;4, lateral lobes,ventral view; 5, median lobe; 6, ovipositor; 7, apex of oviposi- tor; 8, spermatheca. Scale bars = 1 mm. (4 and 5 from Singal, 1987)

Figs. 25 and 26. Localities and host plant for the herein described Caryopemon species.Fig. 25. Map of southwestern China, illustrating localities for Caryopemon species in China and Myanmar. Caryopemon hieroglyphicus = square, Caryopemon luteonotatus = triangle, Caryopemon giganteus = circles. Fig. 26. Seeds of Mucuna sp. (Fabaceae) from Myanmar (Lashio): the middle and right were infested by Caryopemon giganteus. Scale bar = 10 mm.