Tychius perrinae Caldara, 1990

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 : 15-16

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.4501828
persistent identifier	https://treatment.plazi.org/id/632E87E8-FFB1-FFFE-E6D5-F897FB1281DE
treatment provided by	Plazi
scientific name	Tychius perrinae Caldara, 1990
status

Treatment

11. Tychius perrinae Caldara, 1990 View in CoL

( Figures 25–28 View FIGURES 19–36 , 149–152 View FIGURES 149–172 , 257–258 View FIGURES 243–274 , 314 View FIGURES 307–339 , 371 View FIGURES 364–371 , 404 View FIGURES 397–431 , 437 View FIGURES 432–457 , 463 View FIGURES 458–484 )

Tychius perrinae Caldara, 1990: 136 View in CoL

Material examined. CHINA: Chongqing: Youyang Xiaobazhen Xinqiao GoogleMaps (28°50’N; 108°43’E, 767 m), 25-V- 2017, leg Chunyan Jiang (1). Fujian: Jianyang Huangkengaotou (950 m), IV-1973 (1) . Hunan: Changde Shimenhu Pingshan (1200 m), 27-VI-1987 (1) ; Shimenhu Pingshan (1800 m), 29-VI-1987 (1) ; Shimenhu Pingshan Yanjiaqi , 16-VI-1987 (1) ; Zhangjiajie Wulingyuan Wenfengcun Yixiantian , (29°20’N; 110°35’E, 349 m), 16-IV-2018, leg Xiaolong Wang (4) GoogleMaps .

Redescription. Length 2.50–3.00 mm ( Fig. 25–28 View FIGURES 19–36 ). Integument reddish brown except for darker pronotum and elytra at base and sides, on dorsum broadly exposed between vestiture; scales mainly distinctly elongate, whitish and reddish brown, remainder suboval white covering base of pronotum, elytral interstria 1, and interspersed on other interstriae. Rostrum ( Fig. 149–152 View FIGURES 149–172 ) distinctly sexually dimorphic, with rostrum of male short and stout and of female long and thin (Rl/Rw 4.12–4.71 in male, 5.63–5.67 in female; Rl/Pl 0.87–1.00 in male, 0.95–1.06 in female). Antennal funicle 7-segmented. Eyes somewhat prominent. Pronotum transverse (Pw/Pl 1.26–1.38), convex on dorsum. Elytra suboval, moderately elongate, distinctly wider at base than pronotum (Ew/Pw 1.31–1.40; El/Ew 1.42–1.48). Metafemora ( Fig. 258 View FIGURES 243–274 ) with indistinct tooth. Profemora ( Fig. 257 View FIGURES 243–274 ) and protibiae ( Fig. 314 View FIGURES 307–339 ) without sexual characters. Claws with robust medial teeth, as long as half of claw. Male genitalia: body of penis ( Fig. 371 View FIGURES 364–371 ) narrow, nearly parallel at sides, as long as apodeme, apex ( Fig. 404 View FIGURES 397–431 ) slightly narrow. Female genitalia: spermatheca ( Fig. 437 View FIGURES 432–457 ) with parallel-sided long ramus, distinct collum, robust nodulus and robust cornu with rounded apex; spiculum ventrale ( Fig. 463 View FIGURES 458–484 ) long, fork-shaped.

Remarks and comparative notes. This species is related to T. oriens and T. thompsoni , from which it differs by the convex eyes and the rostrum being more curved in lateral view. Additionally, it differs from T. oriens also by the sparser vestiture, which is distinctly bicoloured and not unicolorous, and from T. thompsoni by the more transverse and convex pronotum, the more prominent humeri and tarsomere 3 being distinctly wider than tarsomere 2.

Biology. No data are available.

Distribution. Already known from East China (SHG, ZHE). We also examined specimens from FUJ, Southwest (CHQ) and Central China (HUN). Also known from northern Vietnam (type locality: Ha-Long).