Eutetrapha tianmushana Lin & Bi

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 : 185-187

Eutetrapha tianmushana Lin & Bi , sp. nov.

Figs. 107–114 , 151 f–151k

Eutetrapha chrysochloris ; Pu & Jin, 1991: 190 (part); Hua, 2002: 208; Hua et al., 2009: 213, 354. (nec Bates, 1879)

Description. Male: length: 12.0– 12.5 mm, humeral width: 3.7–4.0 mm. Female: length: 13.5–14.0 mm, humeral width: 4.5–4.8 mm. Body black, covered by metallic blue or green ( Figs. 107–108 ) scales except some black markings. Antennae black, sparsely pilose below, underside of basal three antennomeres covered with metallic blue or green scales. Occasionally with five black spots on occiput. Prothorax with four black markings: two elliptical ones on the disc, a rounded one on each lateral side. Whole scutellum covered with metallic blue or green scales. Each elytron with four black markings: a square one located on basal 1/5; second being an elliptical one with a stalk reaching lateral carina, located before middle of elytron; third being a stout arcuate, transverse vitta; fourth rounded one before apex. Third and fourth could be confluent to be an arc opening to lateral margin, located on middle of apical half. Side of elytra covered by metallic blue to green scales except the carinae and basal eighth. Ventral surface densely clothed with metallic scales, with some black spots ( Fig. 107 c). Legs black, covered with metallic blue or green scales except underside of tarsi, posterior tarsi with black hairs especially at sides ( Fig. 151 j).

The inferior eye lobe three times as long as gena in male ( Fig. 107 e), or slightly longer than gena in female. Antennae longer than body, male longer than female. Antennomere ratio: male: 18: 3: 22: 17: 18: 17: 17: 16: 15: 14: 15; female: 17: 3: 22: 17: 18: 16: 16: 15: 14: 13: 14. Elytron with punctures larger and sparser than that of pronotum, rounded apically. Male claws distinct ( Figs. 147 a & 147b), combining characters seen in the genera Eutetrapha and Paraglenea . Some individuals with posterior claw of mesotarsi simple, or tooth not visible.

Females claws simple. Male genitalia ( Figs. 109–113 ): Tergite VIII ( Figs. 109 a, 109c) slightly broader than long, apex rounded, with sparse and short setae at sides. Spiculum gastrale subequal to ringed part of tegmen in length, spiculum relictum shorter than a half of spiculum gastrale. Tegmen ( Figs. 110 a–c) 2.6 mm in length; lateral lobes stout, about 0.4 mm long and 0.1 mm wide, with one finely setose ridge basally (in ventral view, Fig. 110 d), apex rounded, with setae which are subequal to length of lateral lobes; median lobe with median struts slightly curved and slightly longer than tegmen (14: 13); median struts slightly longer than a half of whole median lobe; apex of ventral plate bluntly pointed; median foramen narrowly elongated; endophallus more than triple length of median lobe, with four pieces of basal plate-like sclerites, two bands of creating armature, and three rod-like sclerites at end, the two longer ones about 2.4 mm, slightly shorter than tegmen, the shorter one about 2.1 mm long. Female genitalia: spermathecal capsule ( Fig. 114 ) composed of an apical orb and a curved stalk, strongly sclerotized part of stalk shorter than apical orb. Spiculum ventrale longer than abdomen. In our observation, spiculum ventrale measured 8.3 mm for an adult compared with abdomen which measured 6.5 mm in ventral view.

Diagnosis. This species is similar to E. chrysochloris chrysochloris ( Bates, 1879) , E. chrysochloris chrysargyrea Bates, 1884 and E. shaanxiana Lin & Yang , sp. nov., but can be distinguished by the distinct male claws, the metallic scales more blue ( Figs. 151 f, 151g & 151k). It differs from E. chrysochloris chrysochloris ( Bates, 1879) and E. chrysochloris chrysargyrea Bates, 1884 also by the elytral apex rounded, apical half of elytron without a black arc and posterior tarsi with blackish hairs especially at sides ( Fig. 151 j). It differs from E.

shaanxiana Lin & Yang , sp. nov. also by the larger pronotal and elytral black maculae, and the second one of elytral black marking reaching lateral carina, scales more blue and more sparse. It is similar to Paraglenea virides ( Pu & Jin, 1991) comb. nov., but can be distinguished by the different male claws and the third elytral black marking not reaching lateral carina.

Remarks. The male claws of this species are unusual ( Figs. 147 a & 147b for pro- and mesotarsi and Fig. 144 for metatarsi usually), and highly variable; it appears to be a combination of Eutetrapha and Paraglenea . Some individuals with claws of mesotarsi as in Figs. 146 a–c, which supports inclusion of this species in the genus Eutetrapha . Some individuals have claws of pro- and metatarsi as in Fig. 144 , which supports a close relationship with the genus Paraglenea .

Etymology. It is named after the type locality Tianmushan, which is located in Zhejiang Province, China.

Distribution. China: Zhejiang.

Type material. Holotype: male ( Figs. 107 a–c, 12.0 mm long), Zhejiang, Xitianmushan , alt. 1200 m, 2010. VII.3, leg. Ming Jin ( IZAS, IOZ (E)1905314, ex CJM) . Paratypes: China : Zhejiang: 1 male, same data to holotype but leg. Li Jin ( IZAS, IOZ (E)1905445, ex CBWX) ; 1 female, same to holotype but leg. Peng-Fei Xu (IZAS, IOZ(E)1905446, ex CBWX); 1 female ( Fig. 108 ), same data to holotype but leg. Dong-Dong Fang (personal collection of Dong-Dong Fang , Zhejiang, China) ; 1 male, Tienmushan, 1927. VII.17 (IZAS, IOZ(E)1905315); 1 female, Xitianmushan, 2008. VI.29, leg. Yong-Xiang Wu (personal collection of Yong-Xiang Wu , Shanghai, China) ; 1 male, Xitianmushan, alt. 1200 m, 2012. V.18, leg. Wen-Xuan Bi ( CBWX), 1 male, same data but alt . 1400 m (CBWX); 1 female, Xitianmushan, alt. 1100 m, 2016. VII.24, leg. Wen-Xuan Bi (CBWX); 1 male, Xitianmushan , alt. 1250 m, 2016. VII.26, leg. Wen-Xuan Bi ( CBWX) ; 1 male, Tianmushan Nature Reserve , alt. 1300 m, 2010. VII.3, leg. Ming Jin ( CCCC, ex CJM) ; 1 male 1 female, same date but (CJM).

Figures

FIGURES 107 – 108. Eutetrapha tianmushana Lin & Bi, sp. nov., habitus. 107. Holotype, male, from China, Zhejiang; a. Dorsal view, b. Lateral view. c. Ventral view. e. Head, in frontal view. 108. Paratype, female, from China, Zhejiang. Scale 2 mm.

FIGURES 109 – 114. Terminalia of Eutetrapha tianmushana Lin & Bi, sp. nov., from China, Zhejiang. 109. Tergite VIII and sternites VIII & IX. 110. Tegmen. 110 d. Lateral lobes in ventral view, showing the ridge at base. 111. Median lobe with median struts. 112. Rod-like sclerites. 113. Male genitalia, before tegmen and median lobes separated. a. Ventral view, b. Lateral view, c. Dorsal view. 114. Female from China, Zhejiang, showing the spermathecal capsule. Scale 1 mm, 110 d, 113 b, 113 c and 114: not to scale.

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.