Tychius zhangi Jiang & Caldara, 2020

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 : 32-33

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.4501860
persistent identifier	https://treatment.plazi.org/id/632E87E8-FFA0-FFD1-E6D5-FA28FE2F80B6
treatment provided by	Plazi
scientific name	Tychius zhangi Jiang & Caldara
status	sp. nov.

Treatment

30. Tychius zhangi Jiang & Caldara n. sp. Zoobank.org/ urn:lsid:zoobank.org:act:0E8C0D6B-E580-43DE-990F-5DC4A26695DC

( Figures 97–100 View FIGURES 91–108 , 219–222 View FIGURES 197–220 View FIGURES 221–242 , 295–296 View FIGURES 275–306 , 333 View FIGURES 307–339 , 346, 358 View FIGURES 340–363 , 389 View FIGURES 388–396 , 425 View FIGURES 397–431 , 453 View FIGURES 432–457 , 480 View FIGURES 458–484 )

Material examined. Holotype, male, CHINA: Xinjiang: Tulufan , (20–140 m), 24-VI-1958, leg Guang Wang ( IOZCAS) . Paratypes, same data as holotype (2 IOZCAS); Jiashi (1160 m), 20-VI-1959, leg Afu Tian (1 IOZCAS); Hejing, 26-VII-1958, leg Changqing Li (1 IOZCAS) .

Diagnostic description. Length 1.90–2.50 mm ( Fig. 97–100 View FIGURES 91–108 ). Vestiture on dorsum grayish unicolorous. Rostrum ( Fig. 219–222 View FIGURES 197–220 View FIGURES 221–242 ) moderately long, poorly sexually dimorphic, slightly longer in female than in male (Rl/Rw 5.30–5.50 in male, 7.00– 7.50 in female; Rl/Pl 0.88–0.92 in male, 0.93–0.94 in female), thin, in lateral view curved at base, then almost straight to apex. Pronotum (Pw/Pl 1.10–1.17) with slightly rounded sides from base to apex, slightly wider than long. Elytra suboval (Ew/Pw 1.26–1.36; El/Ew 1.50–1.69), with slightly rounded sides in basal half. Femora ( Fig. 295–296 View FIGURES 275–306 ) unarmed, tibiae ( Fig. 333 View FIGURES 307–339 ) without sexual characters. Third tarsomere moderately wider than second tarsomere ( Fig. 346 View FIGURES 340–363 ). Claws ( Fig. 358 View FIGURES 340–363 ) with small medial teeth as long as 1/3 of claw, separated from claw from base. Male genitalia: body of penis ( Fig. 389 View FIGURES 388–396 ) in dorsal view moderately large, parallel-sided near to apex, with acutely pointed apex ( Fig. 425 View FIGURES 397–431 ), in lateral view strongly curved and very subtle, nearly as long as apodeme. Female genitalia: spermatheca see Fig. 453 View FIGURES 432–457 ; spiculum ventrale ( Fig. 480 View FIGURES 458–484 ) with thin arms spaced in basal third but distinctly narrowing to middle, then completely joined to apex.

Remarks and comparative notes. This species is closely related to T. tachengicus and T. sulphureus . Tychius zhangi differs by the rostrum of both sexes being longer and that of the female in lateral view of the same width from the antennal insertion to the apex and not distinctly narrowed. The medial teeth of the claw are distinctly smaller and shorter than in the other two species. Finally, the body of the penis in dorsal view is moderately large, parallelsided near to apex, with acutely pointed apex, in lateral view strongly curved and very subtle, nearly as long as an apodeme.

Etymology. The name of this species is the family name of our corresponding author Prof. Runzhi Zhang. We would like to thank him for supporting our work in weevil taxonomy.

Biology. No data are available.

Distribution. China (XIN)