Tychius junceus ( Reich, 1797 )

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 : 21-22

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.4411303
persistent identifier	https://treatment.plazi.org/id/632E87E8-FFAB-FFE4-E6D5-F9CBFE2480C2
treatment provided by	Plazi
scientific name	Tychius junceus ( Reich, 1797 )
status

Treatment

17. Tychius junceus ( Reich, 1797) View in CoL

( Figures 47–50 View FIGURES 37–54 , 171–174 View FIGURES 149–172 View FIGURES 173–196 , 269–270 View FIGURES 243–274 , 320 View FIGURES 307–339 , 377 View FIGURES 372–379 , 410 View FIGURES 397–431 , 442 View FIGURES 432–457 , 468 View FIGURES 458–484 )

Curculio junceus Reich, 1797: 15 . Franz, 1942: 117 ( Tychius View in CoL ). Caldara, 1990: 176 ( Tychius View in CoL ).

Tychius haematopus Gyllenhal, 1835: 409 View in CoL . Franz, 1949: 266. Caldara, 1990: 176.

Material examined. CHINA: Gansu: Mucaozhan , 15-VIII-1980, leg Feng (1) . Xinjiang: Baihaba County, 2-VII- 2014, leg Chunyan Jiang (10); Tacheng County , (46°53’N; 86°23’E, 1239m), 3-VII-2014, leg Chunyan Jiang (1); Baihabacaochang, (1153m), 23-VII-2009, leg Xinlei Huang (6); Qinghe Talaticun, 26-VI-2014, leg Chunyan Jiang (1); Xiaotalate, 9-VIII-1956, leg Weiyi Yang (1) GoogleMaps .

Redescription. Length 2.20–2.60 mm ( Fig. 47–50 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. Rostrum ( Fig. 171–174 View FIGURES 149–172 View FIGURES 173–196 ) markedly tapered in apical half (Rl/Rw 3.82–4.13 in male, 4.19–4.38 in female; Rl/Pl 0.70–0.81 in male, 0.80–1.08 in female). Antennal funicle 7-segmented. Eyes convex, prominent. Pronotum transverse (Pw/Pl 1.10–1.23), with slightly curved sides, widest in front of middle, distinctly convex. Elytra short (Ew/Pw 1.20–1.30; El/Ew 1.29–1.41), heart-shaped, distinctly convex near suture. Femora ( Fig. 269–270 View FIGURES 243–274 ) with indistinct tooth. Profemora and protibiae ( Fig. 320 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. 377 View FIGURES 372–379 ) nearly parallel-sided, distinctly constricted at apex, with long acute tip ( Fig. 410 View FIGURES 397–431 ), slightly shorter than apodeme. Female genitalia: spermatheca ( Fig. 442 View FIGURES 432–457 ) with short ramus slightly enlarged at apex, small and very short collum, indistinct nodulus, long cornu distinctly narrowed at apical third; spiculum ventrale ( Fig. 468 View FIGURES 458–484 ) with poorly sclerotized arms at base, then thin, distinctly sclerotized and convexly divergent.

Remarks and comparative notes. This species can be confused with T. medicaginis , T. aureolus and T. flavus . Apart from the shape of the elytra and the genitalia, it differs from the first taxon by the abruptly tapered rostrum in the apical half, from the second by the male profemora without fringe of scales, and from the third species by the different elytral vestiture with the scales of the striae clearly narrower than those covering the interstriae.

Biology. This species lives mainly on species of Trifolium such as T. arvense L., T. pratense L., the latter introduced in China, but is reported as collected also on Melilotus ( M. officinalis G. G., M. arvensis Walb. , M. macrorhiza Pers. ).

Distribution. Widely distributed in Europe and western and southern Asia. Also known from Morocco. New record from China (GAN XIN).