Eutetrapha shaanxiana Lin & Yang, sp.

Lin, Mei-Ying, Bi, Wen-Xuan & Yang, Xing-Ke, 2017, A revision of the genus Eutetrapha Bates (Coleoptera: Cerambycidae: Lamiinae: Saperdini), Zootaxa 4238 (2), pp. 151-202 : 182-184

Eutetrapha shaanxiana Lin & Yang, sp. nov.

Figs. 98–106, 150f–150k

Eutetrapha metallescens ; Zhou et al., 1988: 105, pl. XV, fig. 143. (nec Motschulsky, 1860) Eutetrapha chrysochloris ; Pu & Jin, 1991: 190 (part); Hua, 2002: 208 (part); Hua et al., 2009: 213, 354 (part). (nec Bates, 1879)

Eutetrapha chrysochloris chrysargyrea ; Chou et al., 2010: 316, fig. 24. (nec Bates, 1884)

Description. Male: length: 11.5–14.0 mm, humeral width: 3.4–4.2 mm. Female: length: 14.6–16.5 mm, humeral width: 4.5–5.3 mm. Body black, covered with metallic green (Figs. 98–101) scales except some black markings. Antennae black, sparsely pilose below, underside of basal three antennomeres covered with metallic green scales. Sometimes there are several black spots on occiput (Figs. 98, 99). Prothorax with four black maculae: two rounded spots on disc, which may be elliptical (Fig. 99) due to lack of scales, a small one on each lateral side. Whole scutellum covered with metallic green scales. Each elytron with four black markings: a square one located on basal 1/5; second being an round to elliptical one located before middle of elytron; third being a rounded (Fig. 98) to stout arcuate, transverse vitta (Figs. 99–101), reaching or not reaching lateral margin; fourth being a rounded to inverted trapezoidal (Fig. 100) one before apex. Third and fourth may be confluent to form an arc (Fig. 99) opening to lateral margin, located on middle of apical half. Side of elytra covered by metallic green scales except carinae ( Figs. 150 h-1 & 150h-2). Ventral surface densely clothed with metallic scales, with few black spots. Legs black, covered with metallic green scales except underside of tarsi, posterior tarsi with black hairs especially at sides ( Fig. 150 j).

Inferior eye lobe four times as long as gena in male, or slightly longer than gena in female. Antennae longer than body, male longer than female. Antennomere ratio: male: 16: 2: 21: 17: 18: 17: 16: 16: 15: 14: 16; female: 16: 2: 22: 17: 18: 16: 15.5: 15: 14: 13: 13. Elytron with punctures larger and sparser than that of pronotum, rounded apically. Male claws: only anterior claws of pro- and mesotarsi appendiculate with small teeth ( Figs. 146 a–c), posterior claws of pro- and mesotarsi without teeth, and claws of metatarsi simple ( Fig. 143 ). Females claws simple ( Fig. 143 ). Male genitalia ( Figs. 102–105 ): Tergite VIII ( Figs. 102 a, 102c) slightly broader than long, apex rounded, with sparse and moderate long setae at sides. Spiculum gastrale slightly shorter than ringed part of tegmen, spiculum relictum shorter than a half of spiculum gastrale. Tegmen ( Figs. 103 a–c) about 2.8 mm in length; lateral lobes slender, each about 0.5 mm long and 0.15 mm wide ( Fig. 103 d), apex with fine setae which are longer than half of lateral lobes; median lobe slightly curved ( Fig. 104 b), slightly longer than tegmen; median struts about half-length of median lobe ( Fig. 104 c); apex of ventral plate ( Fig. 104 a-1) sharply pointed; endophallus more than triple length of median lobe, with two pairs of basal plate-like sclerites (located behind apex of median struts), two bands of indistinct supporting armature, and three rod-like sclerites at end ( Fig. 105 ), two longer ones each about 2.5 mm, slightly shorter than tegmen, short one about 2.4 mm. Female genitalia: spermathecal capsule ( Fig. 106 ) composed of an apical orb and a short but strongly curved stalk, strongly sclerotized part of stalk shorter than apical orb in length. Spiculum ventrale longer than abdomen. In our observation, spiculum ventrale measured 8.0 mm for an adult compared with abdomen which measured 7.5 mm in ventral view.

Diagnosis. This species is similar to Eutetrapha chrysochloris chrysargyrea Bates, 1884 , but can be distinguished by the elytral apex rounded at the outer angle ( Fig. 150 i); black spots on disc of pronotum rounded, and small spots on sides; apical half of elytron with two black spots instead of an arc; side of elytra covered by metallic green scales ( Figs. 150 h-1 & 150h-2); scales much denser ( Figs. 150 f, 150g & 150k); punctures in the four basal black spots on elytra bigger and less numerous; and posterior tarsi with blackish hairs especially at sides and broader because more depressed ( Fig. 150 j).

Etymology. It is named after the type locality Shaanxi Province, China.

Distribution. China: Shaanxi, Gansu, Hubei.

Type material. Holotype, male (Fig. 98), Ningshan, Huoditang, 2010.VII, Youyu07 (IZAS, IOZ(E)1905307); Paratypes: China: Shaanxi: 1 male, Ningshan, Huoditang , alt. 1620 m, 1979. VII.30, leg. Yin-Heng Han ( IZAS, IOZ (E)1905308)) ; 1 male, Ningshan County, Huoditanglinchang, Changbu , alt. 1554 m, 33.26023°N, 108.26539°E, 2015. VII.10, leg. Yi-Zhou Liu ( IZAS, IOZ (E)1905449) ; 1 male (Fig. 99), Ningshan, 1980. VII.1–10, leg. Li-Sheng Chu (IZAS, IOZ(E)1905309); 1 male, Ningshan, Yaquegou , alt. 1580–1850 m, 1999. VII.2, leg. De- Cheng Yuan ( IZAS, ( IZAS, IOZ (E)1905310)) ; 1 male, Shiquan (IZAS, IOZ(E)1905311); 1 female (Fig. 100), Huayinshi, Huashan , alt. 1618 m, 34.4934°N, 110.0812°E, 2007. VI.6, leg. Mei-Ying Lin ( IZAS, IOZ (E)1905312) ; 1 male, Qinling Zhiwuyuan, Daxiagu , 893 m, 33.9303°N, 108.3523°E, 2012. VII.6, leg. Wan-Gang Liu ( IZAS, IOZ (E)1905448, Ceram-142 for molecular study) ; 1 male, Taibai Shan, Tsinling Mts., Houzhenzi vill., 33°53'N, 107°49'E, alt. 1500 m, 2000.IX, leg. Siniaev & Plutenko ( CCH) ; 1 female, S. slope, Xunyangba S+W env., 33°28 – 37'N, 108°23 – 33'E, alt. 1400 – 2100 m, 1995. VI. 5 – 9, leg. L. & R. Businský (CCH); 8 females, 6 km E of Xunyangba , 1000 – 1300 m, 2000. V.23 – VI.13, leg. C. Holzschuh ( CCH). Gansu : 1 female, Zhouqu County, Tiebalinchang, Tiangangou, 2015. VII.26, leg. Guo-Xi Xue ( IZAS, IOZ (E)1905450, Ceram-285 for molecular, ex collection of Guo-Xi Xue, Henan, China) . Hubei: 1 female (Fig. 101), Shennongjia, Jiuhulinchang , alt. 1640 m, 1981. VII.8, leg. Yin-Heng Han ( IZAS, IOZ (E)1905313).

Figures

FIGURES 148 – 155. Scales, elytral apex and tarsus. f. Scales on scutellum and elytron (left of scutellum). g. Scales on pronotum (nearly middle, besides the left black spot). h. Lateral view of left elytron. i. Elytral apex. j. Hind tarsus, showing the hairs at sides. k. Scales on scutellum. 148. Eutetrapha chrysochloris chrysochloris (Bates, 1879). 149. E. chrysochloris chrysargyrea Bates, 1884. 150. E. shaanxiana Lin & Yang, sp. nov.; h- 1, male; h- 2; female. 151. E. tianmushana Lin & Bi, sp. nov. 152. E. metallescens (Motschulsky, 1860). 153. E. lini Chou, Chung & Lin, 2010. 154. E. gui Lin & Yang, sp. nov. 155. Paraglenea virides (Pu & Jin, 1991) comb. nov. Scale 100 µm.

FIGURES 143 – 147. Claw types. 143. Simple. 144. Appendiculate. 145. Only anterior claw appendiculate. 146. Only anterior claw appendiculate at outer side (left mesotarsus of male Eutetrapha). 147. Anterior claw appendiculate at outer side and posterior claw appendiculate normally (left mesotarsus of male Eutetrapha chlorotica Pu & Jin, 1991 and E. tianmushana Lin & Bi, sp. nov.). a. Frontal view. b. Lateral view. c. Lateral view in another side.

FIGURES 102 – 106. Terminalia of Eutetrapha shaanxiana Lin & Yang, sp. nov., from China, Shaanxi. 102. Tergite VIII and sternites VIII & IX. 103. Tegmen. 103 d. Lateral lobes in ventral view, showing the ridge at base. 104. Median lobe with median struts, including the endophallus. 105. Last part of endophallus, showing the rod-like sclerites. A. Ventral view, b. Lateral view, c. Dorsal view. 106. Female from China, Shaanxi, showing the spermathecal capsule. Scale 1 mm, 103 d, 104 a, 104 b, 105 and 106: not to scale.