Tychius praescutellaris ( Pic, 1902 )

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 : 12

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.4411275
persistent identifier	https://treatment.plazi.org/id/632E87E8-FFB4-FFFA-E6D5-FF51FBB886F3
treatment provided by	Plazi
scientific name	Tychius praescutellaris ( Pic, 1902 )
status

Treatment

6. Tychius praescutellaris ( Pic, 1902) View in CoL

( Figures 11–14 View FIGURES 1–18 , 135–138 View FIGURES 125–148 , 249–250, 310, 367, 400, 434, 460)

Miccotrogus praescutellaris Pic, 1902: 147 View in CoL . Caldara, 1990: 120 ( Tychius View in CoL ).

Material examined. CHINA: Inner Mongolia: Huhehaote, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences Farm, Cannabis sp., 8-VII-1961,leg Hongchang Li(1);Otog Qianqi,Dashatou(38°9’N 107°34’E, 1345 m), Medicago sativa , 22-V-2019, leg Chunyan Jiang, Xiaoliang Yang (2). Beijing: Xibeiwang, 15-VIII-1961, leg Shuyong Wang (1). Shaanxi: Yulin, Hengshan, Leilongwan (38°1’N 109°9’E, 1079 m), Medicago sativa , 20-V- 2019, leg Chunyan Jiang, Xiaoliang Yang (11).

Redescription. Length 2.10–2.50 mm ( Fig. 11–14 View FIGURES 1–18 ). Integument reddish except for blackish pronotum, base and sides of elytra and venter; on dorsum covered with grayish brown scales variable in shape, from subrectangular to subelliptical, and width, never seta-like on disc of pronotum and wider on elytra. Rostrum ( Fig. 135–138 View FIGURES 125–148 ) robust (Rl/Rw 3.35–3.67 in male, 3.25–3.50 in female; Rl/Pl 0.74–0.85 in male, 0.79–0.87 in female), in dorsal view with sides slightly convergent from base to apex, in lateral view moderately narrow after scrobe. Antennal funicle 6- segmented. Eyes weakly convex, slightly prominent. Pronotum subquadrate (Pw/Pl 1.04–1.20), with sides slightly curved from base, slightly convex on dorsum. Elytra subrectangular (El/Ew 1.42–1.65), at base distinctly wider than pronotum (Ew/Pw 1.27–1.38), with rectilinear sides, widest at middle, moderately convex. Femora ( Fig. 249–250 View FIGURES 243–274 ) without tooth. Profemora and protibiae ( Fig. 310 View FIGURES 307–339 ) without sexual characters. Claws with small and thin medial teeth, as long as half of claw. Male genitalia: with subparallel sides in basal 2/3 then gradually narrowing to apex ( Fig. 400 View FIGURES 397–431 ), apodemes slightly shorter than body of penis ( Fig. 367 View FIGURES 364–371 ). Female genitalia: spermatheca ( Fig. 434 View FIGURES 432–457 ) with long parallel-sided ramus, almost indistinct collum, thin nodulus, long and thin cornu; spiculum ventrale ( Fig. 460 View FIGURES 458–484 ) with arms joined at base then rectilinear and gradually diverging to apex.

Remarks and comparative notes. This species is easily distinguishable from all other Palearctic species due to the peculiar dorsal vestiture formed by scales that are variable in their shape.

Biology. One specimen was collected on Cannabis sp. around a farm of Beta vulgaris L., but we do not think this is the real host plant of T. praescutellaris . Very recently we collected some specimens on Medicago sativa L. in Inner Mongolia and Shaanxi (see Material examined).

Distribution. Previously known from Kazakhstan, Mongolia, eastern Siberia and from China without more detailed indication. We examined specimens from Northwest China (BEI NMO SHA).