Eutetrapha gui Lin & Yang

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 : 191-192

Eutetrapha gui Lin & Yang , sp. nov.

Figs. 123–130 , 154 f, 154g & 154k

Description. Male: length (n=2): 9.8–12.2 mm, humeral width: 3.3–4.0 mm. Female (n=1): length: 14.2 mm, humeral width: 4.8 mm. Body black, covered by metallic blue ( Figs. 123–124 ) scales except some black markings, under scales is gray pubescence ( Fig. 125 ). Antennae black, sparsely pilose below, basal three antennomeres covered with metallic blue scales except dorsal side. Occiput black except a narrow line surrounding eyes. Prothorax with four black markings: two rounded or square ones on disc, a rounded one on each lateral side. Whole scutellum covered with metallic scales. Each elytron with three black markings: a triangular one located on basal 1/ 5, reaching lateral carina but not reaching suture and scutellum; second being a transverse vitta reaching both lateral carina and suture, located before middle of elytron; third being a black arc, opening to lateral margin, reaching both lateral carina and suture, located on middle of apical half. Side of elytra covered by metallic blue scales except carinae and basal fifth. Ventral surface densely clothed with metallic scales, with some black spots ( Fig. 124 b). Legs black, covered with metallic blue scales except ventral side of tarsi.

The inferior eye lobe two times as long as gena in male, or slightly longer than gena in female. Antennae longer than body, male slightly longer than female. Antennomere ratio: male: 16: 3: 19: 15: 16: 15: 14.5: 14: 13: 12: 15; female: 16: 4: 19: 16: 17: 16: 15: 14: 13: 12: 12. Elytron with punctures larger and sparser than that of pronotum, truncated apically, with a small tooth at outer angle. 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 ). Male genitalia ( Figs. 126–129 ): Tergite VIII ( Figs. 126 a, 126c) broader than long, apex emarginate, with moderate long and denser setae, sparser in middle. Spiculum gastrale much shorter than ringed part of tegmen in length, spiculum relictum shorter than a half of spiculum gastrale. Tegmen ( Figs.

127a–c) 2.4 mm in length; lateral lobes stout, about 0.25 mm long and 0.1 mm wide, with one finely setose ridge basally (in ventral view, Fig. 127 d), apex rounded, with setae which are longer than lateral lobes; median lobe slightly curved and slightly longer than tegmen (9: 8); median struts about two thirds of whole length of median lobe; apex of ventral plate sharply pointed; median foramen strongly elongated; endophallus about triple length of median lobe, with four pieces of basal plate-like sclerites, two bands of creating armature, a strongly sclerotized part (at the apical 1/3) and three rod-like sclerites at end ( Fig. 129 ), two longer ones each about 2.5 mm, subequal to tegmen in length, short one about 2.2 mm. Female genitalia: spermathecal capsule ( Fig. 130 ) composed of an apical orb and a curved stalk, stalk longer than apical orb but less than twice of it in length. Spiculum ventrale much longer than abdomen. In our observation, spiculum ventrale measured 9.0 mm for an adult compared with abdomen which measured 6.5 mm in ventral view.

Diagnosis. This species is similar to Eutetrapha lini Chou, Chung & Lin, 2010 , especially by the metallic blue scales, two similar size black pronotal maculae and three black elytral markings, but can be distinguished by the following characters: black maculae on pronotum larger, the width of the median metallic blue stripe less than one third of the width of each black macula; the basal two black elytral black markings reaching lateral carina, and the second one before middle also reaching suture; black arc on apical half of elytra reaching suture and the metallic blue spot inside the arc much smaller, less than one third of the arc in width; elytral apical tooth at the outer angle more developed; apex of tergite VIII emarginate and apex of ventral plate of median lobe sharply pointed.

Etymology. This species is named after Mr. Mao-Bin Gu, who collected the holotype specimen and who had collected many insects in Hainan Island. The epithet is a noun in the genitive case.

Distribution. China: Hainan.

Type specimens: Holotype, male, Hainan, Ledong County, Jianfengling , 1984 . V.16, leg. Mao-Bin Gu ( IZAS, IOZ (E)1905337, with numbers T-160 & A-7453). Paratypes: 1 male, Hainan, Qiongzhong County, Yinggeling Nature Reserve, Yinggezui , alt. 600 m, 2011 . IV.28, leg. Yi-Ting Chung ( CCCC); 1 female, Hainan, Bawangling, Dongyilinchang , 1981 . VII.10, coll. no. 7-Ba [= Bawangling]-141 (SYSU, En-366120).

Figures

FIGURES 122 – 125. Eutetrapha lini & gui, habitus. 122. Eutetrapha lini Chou, Chung & Lin, 2010, male, from China, Taiwan. 123 – 125. Eutetrapha gui Lin & Yang, sp. nov., male, from China, Hainan. 123. Paratype, male, from China, Hainan, photographed by Wen-Xuan Bi, not to scale. 124. Holotype, male, from China, Hainan; a. Dorsal view. b. Lateral view. 125. Female, from China, Hainan. Scale 2 mm.

FIGURES 126 – 130. Terminalia of Eutetrapha gui Lin & Yang, sp. nov., male from China, Hainan. 126. Tergite VIII and sternites VIII & IX. 127. Tegmen. 127 d. Lateral lobes in ventral view, showing the fine hairs at base. 128. Median lobe with median struts. 129. Last part of endophallus, including rod-like sclerites. 128 b + 129 = complete median lobe and endophallus. a. Ventral view, b. Lateral view, c. Dorsal view. 130. Female from China, Hainan, showing the spermathecal capsule. Scale 1 mm, 127 d, 128 d & 130: 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.