Tychius hedysaricus Karasyov, 1991

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 : 37-38

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.4411375
persistent identifier	https://treatment.plazi.org/id/632E87E8-FF9B-FFD4-E6D5-FB30FA9682CA
treatment provided by	Plazi
scientific name	Tychius hedysaricus Karasyov, 1991
status

Treatment

34. Tychius hedysaricus Karasyov, 1991 View in CoL

( Figures 113–116 View FIGURES 109–120 , 235–238 View FIGURES 221–242 , 303–304 View FIGURES 275–306 , 338 View FIGURES 307–339 , 350, 362 View FIGURES 340–363 , 395 View FIGURES 388–396 , 430 View FIGURES 397–431 , 456 View FIGURES 432–457 , 483 View FIGURES 458–484 )

Tychius hedysaricus Karasyov, 1991: 143 View in CoL .

Material examined. CHINA: Shaanxi: Yulin Dingbian , Hedysarum fruticosum var. mongolicum , 22-VII-1987 (2).

Redescription. Length 2.60–3.20 mm ( Fig. 113–116 View FIGURES 109–120 ). Dorsal integument completely hidden by very dense, overlapped, broad, rounded to oval, yellowish to white scales. Elytral interstriae with broadly oval scales in double to triple rows, and narrower and sparse scales in a median row. Rostrum ( Fig. 235–238 View FIGURES 221–242 ) in lateral view tapered and slightly curved in male, slightly tapered and curved in female (Rl/Rw 5.83–5.87 in male, 7.20–7.27 in female; Rl/Pl 0.85–0.93 in male, 0.90–1.03 in female). Eyes flat. Pronotum (Pw/Pl 1.07–1.11) with slightly curved sides in basal half. Elytra (Ew/Pw 1.25–1.33; El/Ew 1.73–1.90), rectangular, elongate. Femora ( Fig. 303–304 View FIGURES 275–306 ) unarmed. Tibiae ( Fig. 338 View FIGURES 307–339 ) without sexual characters. Third tarsomere distinctly wider than second tarsomere ( Fig. 350 View FIGURES 340–363 ). Claws ( Fig. 362 View FIGURES 340–363 ) with small medial teeth, as long as half of claw, fastened to claw in basal half. Male genitalia: body of penis ( Fig. 395 View FIGURES 388–396 ) moderately wide and with sides slightly convergent in basal 2/3, then distinctly narrowed and parallel sided to apex, with narrow and blunted tip ( Fig. 430 View FIGURES 397–431 ), with apex in lateral view upturned, 1/3 longer than apodeme. Female genitalia: spermatheca ( Fig. 456 View FIGURES 432–457 ) with long parallel-sided ramus slightly curved inwards, short robust collum, robust nodulus, cornu gradually narrowing to apex; spiculum ventrale ( Fig. 483 View FIGURES 458–484 ) with arms almost joined for their whole length.

Remarks and comparative notes. As reported by Karasjov (1991) this species, described based on specimens from Mongolia which we examined, differs from T. gracilitubus by the moderately straight rostrum (especially in the female) and the shape of the penis. The spermathecae are also distinctly different.

Biology. This species occurs in both Mongolia (Karasjov, 1991) and in China on Hedysarum fruticosum Pall. var. mongolicum (Turcz) B. Fedtsch.

Distribution. This species was previously known only from Mongolia. New record from China (SHA).