Plaxomicrus ellipticus Thomson, 1857

He, Si-Yao, Chen, Li & Liu, Zhi-Ping, 2015, Comparative morphology study of the male genitalia in the tribe Astathini from China (Coleoptera: Cerambycidae), Zoological Systematics 40 (2), pp. 197-211 : 206-207

3.1.10 Plaxomicrus ellipticus Thomson, 1857 ( Figs 2D , 3D , 4G–H )

Tegmen about 3.8 times as long as wide, barely curved; lateral lobes very short, about 1/17–1/21 times as long as tegmen, sub-cylindrical, about 1.3–1.5 times as long as wide; with little long hairs at middle; roof very long, about 2.4–3.0 times as long as lateral lobes; apex dehiscent; apical margin arcuate; ringed part converging at apex, apex fishtail. Median lobe plus median struts slightly curved, about 6.2 times as long as wide; median lobes 2.6 times as long as median struts; dorsal plate shorter than ventral plate, apex sharp-pointed. Internal sac with rod at apex, rod longer than median lobe plus median struts and thicker at apical half. 8th abdominal tergaum sub-trapezoidal, 0.9 times as long as wide; apex flat, lateral

© Zoological Systematics, 40(2): 197–211

sides arched and with dense short setae; 8th abdominal sternum slightly longer than tergaum; apex flat, lateral sides arched and with dense short setae; spiculum gastrale short, about 1.2 times as long as tergaum.

Figures

Fig. 2. Tegmen in dorsal view. A. Anastathes parvus hainana. B. A. robustus. C. Bacchisa fortunei. D. Plaxomicrus ellipticus. E. Tetraophthalmus episcopalism. F. T. janthinipennis cyanopterus. G. T. janthinipennis janthinipennis. Scale bar=0.5 mm.

Fig. 3. 8th abdominal segment, ventral view. A. Anastathes parvus hainana. B. A. robustus. C. Bacchisa atritarsis. D. Plaxomicrus ellipticus. E. Tetraophthalmus episcopalism. F. T. janthinipennis cyanopterus. G. T. janthinipennis janthinipennis. Scale bar = 0.5 mm.

Fig. 4. Median lobe plus median struts and rod at apex of internal sac, dorsal view. A–B. Anastathes parvus hainana. C–D. A. robustus. E–F. Bacchisa dioica. G–H. Plaxomicrus ellipticus. I–J. Tetraophthalmus episcopalism. K–L. T. janthinipennis cyanopterus. M–N. T. janthinipennis janthinipennis. Scale bars=0.5mm.