A Revision of the Saperdine Genus Dystomorphus Pic (Coleoptera, Cerambycidae, Lamiinae)

Special Bulletin of the Coleopterological Society of Japan, (1): 267–286 September 22, 2017 Revision of the Genus Dystomorphus 267 A Revision of the Saperdine Genus Dystomorphus PIC (Coleoptera, Cerambycidae, Lamiinae) 1) 2)* Carolus HOLZSCHUH and Mei-Ying LIN 1) Spitzeckweg 11, A-9500 Villach, Austria 2) Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 1 # Beichen West Road, Chaoyang, Beijing, 100101 China *Correspondence Author E-mail: [email protected] Abstract Chinese species of the genus Dystomorphus PIC are revised. Two new species, D. diversus n. sp. from Yunnan and Henan, and D. niisatoi n. sp. from Yunnan are described. A key to the species, habitus and terminalia of all the known seven species are presented. Introduction Dystomorphus PIC, 1926 was established for D. notatus PIC, 1926. The second species, D. esakii was described from Taiwan (HAYASHI, 1974). The third species D. sichuanensis YU, 1994 is quite different from the previous species in color of integument and so is the fourth species D. nigrosignatus PU, WANG et LI, 1998. The fifth species D. piceae HOLZSCHUH, 2003 was often misidentified as D. notatus (CHIANG et al., 1985; HUA, 2002). In this study, two new species belonging to the two species groups of different color of integument, respectively, are described. Totally seven endemic Chinese species of this genus are recognized. Materials and Methods Photographs were taken with several different camera systems. Habitus were usually taken with a Sony T30, or Canon EOS 7D + Canon Macro 100 mm, and some terminalia were taken with Sony T30 + Leica S8AP0. Most of the photographs of terminalia and characteristic photographs were taken with a large depth of field 3D Digital Microscope (Keyence VHX-1000C). Specimens studied are deposited in the following institutions, museums or private collections: BITS: Bin Insect Taxonomy Studio, Beijing, China (will eventually be deposited in China Agri- cultural University, Beijing, China (CAU)) CBWX: Collection of Wen-Xuan BI, Shanghai, China CCCC: Collection of Chang-Chin CHEN, Tianjin, China CCH: Collection of Carolus HOLZSCHUH, Villach, Austria CEK: Collection of Emil Kučera, Sobĕslav, Czech Republic CJY: Collection of Junsuke YAMASAKO, Kawasaki, Japan CPS: Collection of Carlo Pesarini & Andrea SABBADINI, Milano, Italy IZAS: Institute of Zoology, Chinese Academy of Sciences, Beijing, China KUEC: Entomological Laboratory, Faculty of Agriculture, Kyushu University, Fukuoka, Japan MNHN: Muséum National d'Histoire Naturelle, Paris, France MSME: Muh Sheng Museum of Entomology, Taiwan, China NHMB: Naturhistorisches Museum, Basel, Switzerland 268 Carolus HOLZSCHUH and Mei-Ying LIN SWU: Collection of Insects, Southwest University, Chongqing (a.k.a. South-west Agricultural University), Chongqing, China Taxonomy Genus Dystomorphus PIC, 1926 Dystomorphus PIC, 1926: 11. Type species: Dystomorphus notatus PIC, 1926, by monotypy. Dystomorphus: Gressitt, 1951: 586; BreuninG, 1954: 460; BreuninG, 1966: 740; CHIANG et al., 1985: 170; naKamura et al., 1992: 107; LÖBL & smetana, 2010: 323; naKamura et al., 2014: 176; LIN, 2015: 272. Redefinition. Body small sized (below 16 mm), body length more than three times as long as the humeral width of elytra. Head narrower than prothorax; frons usually longer than broad (male) or as broad as long (female); eyes deeply concave, with inferior lobe narrower than the half width of frons. Antennae longer (male) or slightly shorter (female) than body length; scape slightly expanded, without ridge; third antennomere always the longest, fourth longer than scape. Pronotum broader than long, provided with an obvious sharp or blunt tubercle on each side. Elytra gradually narrowed apically, with one or two lateral carinae, of which the internal one from base to near apex, and the external one (if present) quite weak and never reaching the apex; apex rounded, slightly truncated or emarginated. Procoxal cavity closed posteriorly. Metepisternum more than twice as wide anteriorly as posteriorly. Middle tibia with obvious oblique groove; hind femur reaching fourth ventrite; hind tarsus with first segment shorter than the following two combined. Female claw simple. Male claws basically simple, but anterior claw of mid tarsus with a small umbo at outer side (Fig. 3c, d), except for D. esakii. Male terminalia: Apex of tergite VIII rounded, truncated or slightly emarginated; spiculum gastrale subequal to or longer than the length of ringed part of tegmen; spiculum relictum shorter than or subequal to the half length of spiculum gastrale. Tegmen with lateral lobes slender; ringed part el- bowed in the widest point, converging apically; basal piece bifurcated distally. Median lobe slightly curved, subequal length to tegmen; median foramen strongly elongated; endophallus with four plate- like sclerites in basal 1/3 to 1/2, two banks of creating armature before the plate-like sclerites, and an- other two strongly sclerotized parts (usually provided with spine-like sclerites, one behind the plate- like sclerites, the other at apical end) and three rod-like sclerites at apical end. Female terminalia: Spermathecal capsule with stalk slightly shorter to longer than apical lobe; spiculum ventrale much longer than abdomen in ventral view. Diagnosis. Differs from Glenida GAHAN by the specialized male claw of mid tarsus, more elon- gate body (body length more than three times as long as the humeral width of elytra), larger and shaper lateral tubercles of pronotum, and lateral carinae of elytra extend to before apex. Distribution. China. Remarks. Prior to this work, five species of this genus have been recorded from China t( avaKil- IAN & Chevillotte, 2017). Based on the present study, it increases to seven species, including two new species, all of which are endemic to China. This genus can be divided into two subgroups: the notatus species group with red integument, including four species (Dystomorphus notatus, D. esakii, D. piceae and D. diversus); and the sichuanensis species group with black integument, including three species (D. sichuanensis, D. nigrosignatus and D. niisatoi). Revision of the Genus Dystomorphus 269 Figs. 1–3. Habitus of Dystomorphus notatus PIC, 1926. — 1, Holotype ♀, from Yunnan; 2, ♀, from Yunnan; 3, ♂, from Yunnan. — a, Dorsal view; b, lateral view; c & d, left claw of male mid tarsus; h, head in frontal view. Scale: 2.0 mm. Dystomorphus notatus PIC, 1926 (Figs. 1–10) Dystomorphus notatus PIC, 1926: 12. Type locality: China, Yunnan. Type depository: MNHN. Dystomorphus notatus: Gressitt, 1951: 586; BreuninG, 1954: 461; BreuninG, 1966: 740; HUA, 2002: 205 [partim]; HUA et al., 2009: 210, 350 [partim]; LÖBL & smetana, 2010: 323 [partim]. Supplementary description. Body length 9.2–11.2 mm. Frons (Fig. 2h) densely covered with reddish brown pubescence; pronotum covered with reddish brown pubescence on the anterior half of disc and most of sides; scutellum only with grayish white pubescence along middle line; elytron almost always with only one small spot near base (Fig. 3a), sometimes with two small well separated spots (Fig. 2), last black macula partly reaching the apex (apex partly black); apex of femora and part of tarsi black (Figs. 2, 3a, b); underside of body with many small nude punctures, without rounded dark spots on ventrites (Fig. 3b). Elytra distinctly angulate at humeri, emarginated at each apex, with distinct apical teeth at outer angle; disc in apical half provided with quite clear punctures and indis- tinct erect hairs, the latter of which are shorter and much sparser than those on base. Male terminalia (Figs. 4–9): Tergite VIII (Fig. 4a, c) nearly as broad as long, with apex rounded, densely with moderate length setae, which are sparser in middle. Spiculum gastrale subequal to the length of ringed part of tegmen; spiculum relictum shorter than the half length of spiculum gastrale. Tegmen (Fig. 5a, b) 2.00 mm in length; lateral lobes slender, with each lobe about 0.40 mm in length and 0.08 mm in width, provided with one finely setose ridge basally (in ventral view, Fig. 9); apex of lobe rounded, with setae which are as long as lateral lobes. Median lobe almost straight (Fig. 6b) and slightly longer than tegmen (21 : 20); median struts (Fig. 6c) about half of the whole length of median lobe; ventral plate gradually narrowed to rounded apex (Fig. 6m); endophallus about twice the length 270 Carolus HOLZSCHUH and Mei-Ying LIN Figs. 4–10. Genital organs of Dystomorphus notatus PIC, 1926. — 4–9, Male terminalia; 10, female spermathecal capsule. — 4, 8, Tergite VIII with sternites VIII & IX; 5, tegmen; 6, median lobe with endophallus; 7, rod-like sclerites; 9, apical part of tegmen and median lobe. — a, Ventral view; b, lateral view; c, dorsal view; m, magnified. (4–7, Yunnan, Baishui; 8–9, Yunnan, Jizushan; 10, Yunnan.) Scale: 6a–c, 2.0 mm; 6m, 8a, not to scale; others, 1.0 mm. of median lobe, with four pieces of plate-like sclerites in basal 1/3, two bands of creating armature before the plate-like sclerites, and three rod-like sclerites at apical end (Fig. 7), of which two longer ones are about 1.60 mm and much shorter than tegmen in length, short one about 1.40 mm. Female terminalia: Spermathecal capsule (Fig. 10) composed of an apical orb and a curved stalk, the latter of which is shorter than the former. Spiculum ventrale much longer than abdomen; in a spec- imen examined, spiculum ventrale 5.80 mm in length measured from ventral view while in abdomen 4.20 mm in length. Remarks. The male specimens examined are very well identical with the female holotype in the elytral maculae. Dystomorphus notatus has so far been recorded based on the misidentification. The record from Shaanxi (CHIANG et al., 1985) should be corrected as D. piceae; records from Sichuan (HUA, 2002; HUA et al., 2009; LÖBL & smetana, 2010) could be D. piceae or D. diversus; records from Gansu and Qinghai (HUA, 2002; HUA et al., 2009; LÖBL & smetana, 2010) are still doubtful.

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