Sinodorcadion jiangi, Xie, Guang-Lin, Shi, Fu-Ming & Wang, Wen-Kai, 2013

Xie, Guang-Lin, Shi, Fu-Ming & Wang, Wen-Kai, 2013, A review of the genus Sinodorcadion Gressitt, 1939 with description of three new species from China (Coleoptera: Cerambycidae: Lamiinae), Zootaxa 3709 (6), pp. 581-590 : 584-585

3. Sinodorcadion jiangi , sp. nov.

( Figs 4–14 , 33–34 )

Material examined. Holotype, male, China: Zhejiang, West Tianmushan, in the second half of June 2010, leg. Xiao-ling Niu, by a Malaise trap, altitude 1090 m. Paratype, 1 female, same locality with holotype, 25 to 26 July 2011, leg. Guang-lin Xie, in a yellow plastic dish with soapy water placed on the ground. Type specimens are deposited in the Entomological Museum, Yangtze University (YZU), Jingzhou, Hubei, P. R. China.

Description. Male. Length 7.5 mm, maximum width of elytra 2.5 mm. Body reddish brown, covered with thin gray-brown pubescence. Antenna reddish brown except for scape mostly dull brown and apices of antennomeres 3–11 dull brown, femur and tarsus mostly dull brown, apex of tibia dull brown. Elytron unevenly covered with pubescence, partly denser and forming mottled maculae.

Head densely punctate; frons subquadrate, slightly convex. Lower eye lobe longer than broad, distinctly longer than gena in front view. Antenna about 1.4 times as long as body; antennal tubercles prominent, widely separated from each other; scape cylindrical, robust; antennomere 3 longest, about 1.7 times as long as scape; antennomeres 4–10 successively decreasing in length, antennomere 11 about as long as antennomere 5. Pronotum densely punctate, slightly wider than long, posterior margin narrower than anterior margin; disc convex; lateral tubercle small, short and obtuse. Scutellum short, rounded apically. Elytra long-oval, widest across middle, oblique-truncate apically, external angles of apices rounded; punctures on surface coarser than pronotum, gradually becoming finer towards to apices. Mesosternum impunctate, central portion of metasternum impunctate, and sternites impunctate except for both sides of basal two segments sparsely and shallowly punctate laterally.

Female. Length 7.5 mm, maximum width of elytra 3.0 mm. Similar to male, but body nearly black; antenna reddish brown except for apical third of scape and apices of antennomeres 3-11 blackish brown; tibia reddish brown except for apex slightly dull brown and tarsus mostly reddish brown. Elytral surface slightly mottled with gray brown pubescent maculae. Antenna slightly longer than body. Frons more transverse, elytra broader and prosternum more sparsely punctate than male, prosternal process and mesosternum impunctate; last visible abdominal segment extends the apex of elytra.

Male genitalia. Tegmen length approximately 1.70 mm, maximum width of ringed part 0.68 mm. Each lateral lobe length approximately 0.38 mm, basal width approximately 0.23 mm, ventral surface dotted with unevenly punctures, furnished with a fulvous bristle in each puncture, apices separated from each other. Median lobe plus median struts length approximately 1.75 mm, strongly curved, median struts moderately sclerotized. Internal sac with basal region furnished with two sets of microscopic zonal sclerites on ventral wall, each set with four moderately broad and sclerotized sclerites, ejaculatory ampoule moderately swelling and short.

Comments. The species is very similar to S. punctulatum Gressitt , but can be distinguished from the latter by its mesosternum without punctures, head, pronotum and elytra remarkably reddish brown in male, and apex of antennomere, apex of tibia distinctly dark brown and tarsus partly dark brown. The species is easily distinguished from S. subspinicolle Breuning by its antennae longer than body in female, elytra without basal and posteromedial transverse bands and prosternum with sparse punctures.

Distribution. China (Zhejiang).

Etymology. The new species is named after Prof. Shu-nan Jiang (= Shu-nan Chiang) to honor his contribution to taxonomic study of Chinese longicorn beetles.

Figures

FIGURES 4 – 14. Habitus of Sinodorcadion jiangi sp. nov.. 4 – 5, 9. holotype, male. 4. dorsal view. 5, 9. ventral view. 6 – 8. paratype, female. 6. dorsal view. 7 – 8. ventral view. 10 – 12. male genitalia. 10. ventral view. 11. lateral view. 12. lateral lobe of tegmen, ventral view. 13 – 14. male tergite VIII. 13. dorsal view. 14. ventral view. Scales: 0.5 mm.

FIGURES 31 – 35. Pronotum of Sinodorcadion spp. 31. S. punctulatum Gressitt, male. 32. S. punctuscapum sp. nov. male. 33 – 34. S. jiangi sp. nov. 33. male. 34. female. 35. S. magnispinicolle sp. nov. female.