Tychius aureolus Kiesenwetter, 1852

Jiang, Chunyan, Caldara, Roberto & Zhang, Runzhi, 2020, The genus Tychius Germar (Coleoptera: Curculionidae: Curculioninae) in China, with description of three new species, Zootaxa 4856 (1), pp. 1-62 : 20-21

publication ID	https://doi.org/ 10.11646/zootaxa.4856.1.1
publication LSID	lsid:zoobank.org:pub:0C2E90FC-25FD-455D-86A7-0BA8210C0A30
DOI	https://doi.org/10.5281/zenodo.4411299
persistent identifier	https://treatment.plazi.org/id/632E87E8-FFAC-FFE5-E6D5-FE55FDAA832E
treatment provided by	Plazi
scientific name	Tychius aureolus Kiesenwetter, 1852
status

Treatment

15. Tychius aureolus Kiesenwetter, 1852 View in CoL

( Figures 39–42 View FIGURES 37–54 , 163–166 View FIGURES 149–172 , 265–266 View FIGURES 243–274 , 318 View FIGURES 307–339 , 375 View FIGURES 372–379 , 408 View FIGURES 397–431 , 440 View FIGURES 432–457 , 466 View FIGURES 458–484 )

Tychius aureolus Kiesenwetter, 1852: 640 View in CoL . Franz, 1942: 123. Caldara, 1990: 174.

Tychius femoralis C. N. F. Brisout de Barneville, 1863: 771 View in CoL . Franz, 1942: 123. Caldara, 1990: 174.

Material examined. CHINA: Gansu: Jiuquan, Chengjiao Nongchang, Glycyrrhiza uralensis , 24-VII-1962, leg Hongxing Li (1); Longnan Mocaozhan, VIII-1981 (1); same data, 5-VIII-1982, leg Feng (1); same data, Medicago sp., 9-VII-1983, leg Juyi Zhang (1); same data, Glycine sp., 10-VII-1983, leg Jian Lan (1); same data, Medicago sp., 14-VI-1980 (1); Weiwu Huangyangzhen (1800 m), 30-VI-1962, leg Hongxing Li (1). Inner Mongolia:Alashanzuoqi Helanshan Shuimogou (32°56’N; 105°40’E, 2307 m), 26-VII-2010, leg Meiying Lin (1). Jiangsu: Zhangjiagang, V-1960, leg Zhao (1). Xinjiang: Baihaba County (48°39’N; 86°42’E, 1314 m), 2-VII-2014, leg Chunyan Jiang (10); Baihabacaochang (1153 m), 22-VII-2009, leg Xinlei Huang (18); same data, 23-VII-2009, leg Xinlei Huang (44); Habahe Baihabadaxiagu (48°39’N; 86°43’E, 1314m), 2-VII-2014, leg Chunyan Jiang (1); Hejing (950-1170 m), 20-V-1958, leg Guang Wang (1); Hejing (1130 m), 22-VII-1958, leg Guoyuan Chen (1); Jiashi (1160 m), 20-VI-1959, leg Afu Tian (1); Jimunai County (47°25’N; 85°53’E, 1089 m), 3-VII-2014, leg Chunyan Jiang (3); same data, 2-VII-2013, leg Zhiliang Wang (1); Kelamayi Muer Hake (45°42’N; 85°11’E, 276 m), 4-VII-2014, leg Chunyan Jiang (1); Manasi (400-550 m), 11-VI-1957, leg Guang Wang (1); Moyu (1240m), 17-V-1959, leg Changqing Li (1); Qinghe (1260 m), 6-VII-1960, leg Shuyong Wang (3); Qinghe Buluke (1153 m), 3-VII-2009, leg Xinlei Huang (1); Qinghe Takeshiken Buergen, 26-VI-2014, leg Chunyan Jiang (2); Qinghe Talatecun, 29-VI-2014, leg Chunyan Jiang (1); Rouzi Hetian (1050m), 5-VI-1958, leg Changqing Li (1); Shanshan (22-350 m), 20-V-1958, leg Changqing Li (2); Shufu (1200 m), 5-VII-1959, leg Changqing Li (3); same data, 5-VII-1959 (1); Tacheng County (46°53’N; 86°23’E, 1239 m), 3-VII-2014, leg Chunyan Jiang (4); VIII-1956, leg Weiyi Yang (1); Tulufan (20-140 m), 23-V-1958, leg Changqing Li (3); Tulufan (40 m), 29-VI-1958, leg Changqing Li (7); Tulufan, 30- VI-1956 (1); Tuokexun (76 m), 20-VI-1958, leg Guang Wang (1); Weili (1000 m), 12-VII-1958, leg Changqing Li (2); Xiaotakete, 9-VI-1956, leg Weiyi Yang (1); Yan qi (1060 m), 7-VI-1957, leg Weiyi Yang (1); Yan qi (950-1170 m), 7-VIII-1958, leg Changqing Li (5); Ziniquan, 9-VI-1957, leg Chunpei Hong (5); same data, 10-VI-1957, leg Zhibang Lu (1); same data, 12-VI-1957, leg Chunpei Hong (1); same data, 12-VI-1957, leg Weiyi Yang (3); same data, 12-VI-1957, leg Zhibang Lu (1); 23-V-1963 (1).

Redescription. Length 2.00– 2.60 mm ( Fig. 39–42 View FIGURES 37–54 ). Integument blackish brown except for reddish antennae and legs; on dorsum densely covered with narrow, moderately elongate, rectangular to subelliptical yellowish to grayish scales, sometimes paler on interstria 1 and sides of elytra. Rostrum ( Fig. 163–166 View FIGURES 149–172 ) distinctly attenuate in distal half (Rl/Rw 3.75–4.67 in male, 4.85–5.00 in female; Rl/Pl 0.82–0.90 in male, 0.88–0.94 in female). Antennal funicle 7-segmented. Eyes convex, distinctly prominent. Pronotum transverse (Pw/Pl 1.14–1.25), with slightly curved sides, widest in front of middle, somewhat convex. Elytra suboval (El/Ew 1.32–1.39; Ew/Pw 1.23–1.35), with moderately rounded sides, widest in basal half, somewhat convex. Femora ( Fig. 265–266 View FIGURES 243–274 ) with indistinct tooth, profemora of male with fringe of hair-like scales. Protibiae ( Fig. 318 View FIGURES 307–339 ) without sexual characters. Claws with robust medial teeth, as long as 2/3 of claw. Male genitalia: body of penis ( Fig. 375 View FIGURES 372–379 ) narrow, nearly parallel-sided or slightly enlarged from base to apex, narrowed only until near apex, with indistinct tip ( Fig. 408 View FIGURES 397–431 ), as long as apodeme. Female genitalia: spermatheca ( Fig. 440 View FIGURES 432–457 ) small, stout, with small ramus perpendicular to nodulus, short collum continuing with cornu to apex; spiculum ventrale ( Fig. 466 View FIGURES 458–484 ) spaced at basal quarter, then narrowed.

Remarks and comparative notes. This species is very closely related to and easily confused with T. medicaginis , apart from relevant differences in the genitalia. External distinguishing characters are the profemur of T. aureolus males being fringed with white scales and the rostrum of the female tapered in lateral view.

Biology. This species feeds on Medicago such as M. sativa L., M. falcata L. and M. prostrata Jacq. , the first two species introduced in China. It was also collected on Melilotus and Trifolium spp. but these records need to be confirmed. We have one specimen labeled as collected on Glycyrrhiza uralensis , however, we believe this association to be incidental.

Distribution. Widely distributed in Europe and western and southern Asia. Reported also from Egypt. New record from China (GAN NMO JIA XIN).