Eutetrapha parastigmosa 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 : 162-164

Eutetrapha parastigmosa Lin & Yang , sp. nov.

Figs. 27–37

Eutetrapha stigmosa ; Pu & Jin, 1991: 191, 196, pl. IIIB: 3; Hua et al., 2009: 455 (part); Löbl & Smetana, 2010: 324 (part). (nec Pu & Jin, 1991)

Eutetrapha sp.; Lin, 2015: 278, fig. 217696.

Description. Male (n = 2): length: 13.8–14.2 mm, humeral width: 3.8–4.0 mm. Female (n = 2): length: 16.5–19.0 mm, humeral width: 4.8–5.5 mm. Body black. Head black, frons and genae clothed with grayish-white pubescence, vertex with two pair of grayish-white longitudinal stripes, one in middle and another behind superior eye lobes; lateral side of inferior eye lobe (tempora, Fig. 27 b) covered with grayish-white pubescence. Antenna black, antennomeres I to III with grayish-white pubescence beneath, while antennomeres IV to IX ringed with grayishwhite pubescence (usually more developed on ventral and inner sides), sparsely fringed with short hairs on ventral sides of basal five antennomeres. Prothorax dark black with four grayish-white pubescent longitudinal stripes, two median stripes sparse and indistinct, connected to each other at base and apex, and one on each side attaining basal and apical margins. Basal margin of pronotum and elytra with grayish-white pubescence; medium and margin of scutellum with pubescence. Elytron dark black, near median suture sparsely clothed with grayish-white pubescence, with seven grayish-white pubescent spots situated along humeral carina and arranged in a longitudinal row, not uniform in size (usually third and fifth are smaller). Elytra clothed with yellowish grey pubescence laterally ( Figs. 27 b & 29). Legs clothed with grayish-white pubescence. Ventral surface mostly covered with whitish gray pubescence ( Fig. 27 b).

Head slightly narrower than prothorax. Eyes medially emarginate, inferior eye lobes nearly 3.0 times as high as (male) or subequal to (female) genae. Antennae slender, slightly longer than (male) or subequal to (female) body; antennomeres ratio: male: 15:3:25:18:17:16:16:?:?:?:?; female: 19:4:28:19:19:16:16:16:16:14:15. Prothorax densely punctured, with three glossy calli on pronotum ( Fig. 29 ). Elytron densely and coarsely punctured, gradually narrower apically, with two lateral carinae, neither from base nor reaching apex; apex rounded, with a blunt tooth at inner angle. Sternite VII of male narrow, apical margin slightly emarginate, with dense brown apical hairs; sternite VII of female with a middle groove, with longer apical brown hairs. Legs slender, mesotibiae slightly grooved, metafemur reaching fourth or fifth abdominal segment, first metatarsal segment longer than following two segments combined. Anterior claw of pro- and mesotarsal claws of male with a small tooth ( Figs. 146 a–c), female tarsal claws and metatarsal claws of male simple ( Fig. 143 ). Male genitalia ( Figs. 30–36 ): Tergite VIII ( Figs. 30 & 35 ) longer than broad, apex weakly projected, with setae which are long at sides, and shorter and sparser at middle. Spiculum gastrale slightly shorter than ringed part of tegmen, spiculum relictum about one half of spiculum gastrale in length. Tegmen ( Figs. 31 a–c) about 3.1 mm in length; lateral lobes slender, tapering apically, each about 0.7 mm long and 0.2 mm wide ( Fig. 33 ); apex with fine setae which are subequal to length of lateral lobes; median lobe slightly curved ( Fig. 32 b) in lateral view, subequal to tegmen in length; median struts shorter than half-length of median lobe ( Fig. 32 c); apex of ventral plate ( Fig. 32 a) pointed; endophallus nearly four times as long as median lobe, with four pieces or more of basal plate-like sclerites (located behind apex of median struts), two bands of supporting armature, and three rod-like sclerites at end ( Fig. 34 ), each about 3.0 mm, subequal to length of tegmen. Female genitalia: spermathecal capsule ( Fig. 37 ) composed of an apical orb and a curved stalk, strongly sclerotized part of stalk only a little longer than apical orb. Spiculum ventrale longer than abdomen. In our observation, Spiculum ventrale measured 9.0 mm for an adult compared with abdomen which measured 8.5 mm in ventral view.

Diagnosis. This species is similar to Eutetrapha stigmosa Pu & Jin, 1991 but can be distinguished by: a. with one more grayish-white or yellowish grey spot after middle of lateral spotted stripe on each elytron, that is, seven spots in total; b. antennomere III only covered with grayish-white pubescence beneath while upper side black; c. tergite VIII weakly projected and median lobe with median struts more strongly curved.

Etymology. This species name is derived from its similarity to Eutetrapha stigmosa Pu & Jin, 1991 .

Remarks. The known localities of this species are Shaanxi, Hubei, Henan and Chongqing, which indicates a relationship with the Qinling Mountains. One pair of specimens was reported from Henan, Songshan, Baiyunshan by Wang (2014: 722, fig. 3419+2) as a variety of E. elegans , which obviously belongs to this new species and the locality may be correct.

Distribution. China: Shaanxi, Hubei, Chongqing, Henan.

Type specimens examined. Holotype ( Fig. 27 ), male, Hubei, Shennongjia, 1981. VII.21–30, leg. Pei-Yu Yu ( IZAS, IOZ (E)217696, misidentified as paratype of Eutetrapha stigmosa Pu & Jin, 1991 ) . Paratypes: 1 female, Hubei, Shennongjia, Muyu , alt. 1200 m, 1983. VIII.26, leg. Gen-Tao Jin, Zu-Yao Liu, Jian-Zhong Zheng ( SHEM, 24116857, misidentified as allotype of Eutetrapha stigmosa Pu & Jin, 1991 ) ; 1 female ( Fig. 29 ), Shaanxi, Ningshan, Huoditang alt. 1580 m, 1998. VIII.22, leg. De-Cheng Yuan ( IZAS, IOZ (E)1905303) ; 1 male ( Fig. 28 ), Chongqing, Chengkou, Mingzhong, Shapo , N31°73.792′, E108°80.328′, alt. 1180, leg. Yu Li ( CCCC, B08L0343).

Figures

FIGURES 27 – 29. Eutetrapha parastigmosa Lin & Yang, sp. nov., habitus. 27. Holotype, male, from China, Hubei. a. Dorsal view, b. Lateral view. 28. Paratype, male, from China, Chongqing. 29. Paratype, female, from China, Shaanxi. Scale 2 mm.

FIGURES 30 – 37. Terminalia of Eutetrapha parastigmosa Lin & Yang, sp. nov. 30 – 34. Male holotype from Hubei. 35 – 36. Male paratype from Chongqing. 30 & 35. Tergite VIII and sternites VIII & IX. 31. Tegmen. 32. Median lobe plus endophallus (last part of endophallus including rod-like sclerites lost). 33. Finely setose basal carina in ventral side of tegmen. 34. Rod-like sclerites. 36. Male genitalia. 37. Female from Shaanxi, showing the spermathecal capsule, with part of basal stalk lost. a. Ventral view, b. Lateral view, c. Dorsal view. Scale 1 mm. 32 – 34 & 36 – 37. not to scale.

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.