Eutetrapha metallescens Motschulsky 1860
Creators: name: Lin, Mei-Ying
name: Bi, Wen-Xuan
name: Yang, Xing-Ke
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Eutetrapha
Eutetrapha metallescens

description: Eutetrapha metallescens (Motschulsky, 1860)
Figs. 115–121, 152 f & 152g
Saperda metallescens Motschulsky, 1860: 150, pl. X. fig. 2. Type locality: Russia, Siberia. Type depository: ZMUM. Eutetrapha metallescens: Bates, 1884: 256; Heyden, 1885: 310; Okamoto, 1927: 83; Plavilstshikov, 1930: 55; Wu, 1937: 761; Matsushita, 1933: 403; Gressitt, 1951: 555; Breuning, 1966: 676; Pu, 1980: 107, pl. XI, fig. 148; Pu & Jin, 1991: 189; Lee, 1987: 198, pl. 24, fig. 271; Hua, 2002: 208; Hua et al., 2009: 213, 354, pl. LXXVIII, 898; Löbl & Smetana, 2010: 323; Jang et al., 2015: 358, figs.; Hwang, 2015: 450, figs.
Saperda metallescens; Abdullah & Abdullah, 1966: 89.
Supplementary description. Male genitalia (Figs. 117–120): Tergite VIII (Figs. 117 a, 117c) broader than long, apex rounded, with sparse and short setae. Spiculum gastrale much shorter than ringed part of tegmen in length, spiculum relictum shorter than a half of spiculum gastrale. Tegmen (Figs. 118 a–c) length about 3.4 mm; lateral lobes stout, each about 0.4 mm long and 0.2 mm wide (Fig. 118 d), apex truncated and with fine setae which are as long as or shorter than lateral lobes, basal 2/3 strongly expanded in lateral view (Fig. 118); median lobe slightly curved (Fig. 119 b), much longer than tegmen (9:7); median struts about half-length of median lobe (Fig. 119 c); apex of ventral plate (Fig. 119 a) sharply pointed; endophallus two times as long as median lobe, with two pairs of basal plate-like sclerites (located right behind apex of median struts), two bands of indistinct supporting armature, and three rod-like sclerites at end (Fig. 120), two longer ones each about 2.4 mm, much shorter than tegmen, short one about 1.9 mm. Female genitalia: spermathecal capsule (Fig. 121) composed of an apical orb and a strongly curved stalk, strongly sclerotized part of stalk shorter than apical orb in length. Spiculum ventrale subequal to abdomen in length. In our observation, spiculum ventrale measured 8.0 mm for an adult compared with abdomen which measured 7.8 mm in ventral view.
Diagnosis. Among the congeners with metallic scales, this species can be easily distinguished by the smaller black maculae on both pronotum and elytra, especially the narrow black hook on apical half of elytra, and the distinct apex of lateral lobes of tegmen (Figs. 118 a–e).
Host plants. Prunus armeniaca Linnaeus (Rosaceae), Salix sp. (Salicaceae).
Remarks. Shaanxi was first reported by Zhou et al. (1988) but we believe that was a misidentification of E. shaanxiana Lin & Yang sp. nov., which may be confirmed by the figure 143 in that book. Therefore, we remove it from that locality list in this work.
Distribution. China: Heilongjiang, Jilin, Liaoning, Hebei, Shandong; Russia (Amur, E. Siberia), North Korea, South Korea.
Other specimens examined. Heilongjiang: 1 female, Maoershan, 1931. VIII.19 (IZAS); 1 female, Dailing, 1957. VII.9 (IZAS); 1 female, Dailing, Liangshuigou, 1957. VII.25 (IZAS); 1 female, Dailing, alt. 390 m, 1957. VIII.22, leg. Zhong He (IZAS); 1 female, Hengdaohezi, 1939. VII.15 (IZAS); 1 female, Ercengdianzi, 1938. VI.5 (IZAS); 1 female, Ercengdianzi, 1941. VI.15 (IZAS). Jilin: 1 female, Fusong, 1955. VI.5 (IZAS); 1 male, Changbaishan, 1982. VII.17, leg. Bao-Lin Zhang (IZAS); 2 females, Changbaishan, alt. 740 m, 1991. VII.17–26, leg. Pei-Yu Yu (IZAS); 1 female, Changbaishan, alt. 740 m, 1993. VII.4–7, leg. Pei-Yu Yu (IZAS). Liaoning: 2 females, Gaolingzi, 1937. VII.3 (IZAS); 2 males 3 females, Gaolingzi (IZAS). Hebei: 4 females, Zunhua, E. Tomb (IZAS). Shandong: 1 female, Qingdao, 1937.VIII, leg. V. J. Tolmachow (IZAS).
description: Published as part of Lin, Mei-Ying, Bi, Wen-Xuan & Yang, Xing-Ke, 2017, A revision of the genus Eutetrapha Bates (Coleoptera: Cerambycidae: Lamiinae: Saperdini), pp. 151-202 in Zootaxa 4238 (2) on pages 187-188, DOI: 10.11646/zootaxa.4238.2.1, http://zenodo.org/record/345192