Tychius bajtenovi Caldara, 1986

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 : 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.4411349
persistent identifier	https://treatment.plazi.org/id/632E87E8-FF9F-FFD1-E6D5-FBDCFA8085B9
treatment provided by	Plazi
scientific name	Tychius bajtenovi Caldara, 1986
status

Treatment

31. Tychius bajtenovi Caldara, 1986 View in CoL

( Figures 101–102 View FIGURES 91–108 , 223–224 View FIGURES 221–242 , 297–298 View FIGURES 275–306 , 334 View FIGURES 307–339 , 347, 359 View FIGURES 340–363 , 390 View FIGURES 388–396 , 426 View FIGURES 397–431 )

Tychius bajtenovi Caldara, 1986: 186 View in CoL .

Lepidotychius mongolicus Bajtenov, 1977 View in CoL (not Csiki, 1901): 161. Caldara, 1986: 186 ( Tychius View in CoL ).

Material examined. CHINA: Inner Mongolia: Yimengdaqi , 22-VII-1987, leg Zhanrong Qiao (1) .

Redescription. Length 2.70–3.00 mm ( Fig. 101–102 View FIGURES 91–108 ). Dorsal integument completely hidden by very dense, overlapped, broad, rounded to oval, yellowish scales (paler at sides), irregularly arranged on elytral interstriae with a few slightly elongate subelliptical scales intermixed. Rostrum ( Fig. 223–224 View FIGURES 221–242 ) in lateral view feebly curved in both sexes (Rl/Rw 4.90–5.00 in male, 5.03–5.50 in female; Rl/Pl 0.77–0.81 in male, 0.89–0.93 in female). Eyes flat. Pronotum subquadrate (Pw/Pl 1.02–1.12), with weakly curved sides in basal half, moderately convex. Elytra elongate, rectangular (El/Ew 1.55–1.70; Ew/Pw 1.25–1.36), subparallel-sided in basal two thirds, weakly convex. Femora ( Fig. 297–298 View FIGURES 275–306 ) unarmed, protibiae ( Fig. 334 View FIGURES 307–339 ) distinctly curved in male. Third tarsomere distinctly wider than second tarsomere ( Fig. 347 View FIGURES 340–363 ). Claws ( Fig. 359 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. 390 View FIGURES 388–396 ) moderately wide and with sides very slightly convergent in basal 2/3, then distinctly narrowed and parallel sided to apex, with wide and blunted tip ( Fig. 426 View FIGURES 397–431 ); apex in lateral view downturned, longer than apodeme. Female genitalia ( Caldara 1986): spermatheca with long parallel-sided ramus, short robust collum, robust nodulus, cornu gradually narrowing to apex; spiculum ventrale with arms slightly spaced and convergent in basal third, then joined to apex.

Remarks and comparative notes. This species differs from T. kaszabi by the very dense dorsal vestiture formed by ruffled, irregularly arranged broad scales, from T. gracilitubus by the slightly curved rostrum in lateral view and from T. crassifemoris by longer rostrum in both sexes and lack of particular abdominal characters in female.

Biology. This species probably lives on Hedysarum sp. (Karasjov, 1991).

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