Tychius uralensis Pic 1902
Creators: name: Jiang, Chunyan
name: Caldara, Roberto
name: Zhang, Runzhi
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Tychius
Tychius uralensis

description: 4. Tychius uralensis Pic, 1902
(Figures 7–10, 131–134, 247–248, 309, 366, 399, 433, 459)
Tychius uralensis Pic, 1902: 142. Franz, 1942: 261. Caldara, 1990: 108.
Material examined. CHINA: Beijing: Badaling (700 m), 18-V-1979 (1); same data, 20-IV-1989 (1); same data, on Caragana sinica, 21-V-1964, leg Wenzhen Ma (3); Xiangshan, on Caragana sinica, 8-V-1963, leg Tiesheng Li (5); same data, 5-V-1964, leg Wenzhen Ma (4).
Redescription. Length 3.30–4.10 mm (Fig. 7–10). Integument blackish except for brownish apical half of rostrum, antennae, and legs; on dorsum, covered with elongate subrectangular scales and wide subelliptical scales; on elytra elongate scales mostly reddish brown and at sides partly whitish; on femora and tibiae white and brown scales intermixed; wide scales white and more abundant at base and in apical half of odd interstriae. Rostrum (Fig. 131–134) thin, especially in female, moderately long (Rl/Rw 4.07–4.23 in male, 4.80–5.00 in female; Rl/Pl 0.90– 1.05 in male, 1.00– 1.10 in female), in dorsal view with sides slightly convergent from base to apex. Antennal funicle 7-segmented. Eyes slightly prominent. Pronotum transverse (Pw/Pl 1.19–1.40), with subparallel sides in basal half, widest in basal third. Elytra oblong oval, distinctly wider than pronotum (El/Ew 1.45–1.54 in female; Ew/Pw 1.41– 1.51), with rectilinear sides and widest in basal half, convex. Femora (Fig. 247–248), especially metafemora, with distinct tooth; profemora in male with indistinct fringe of white scales. Tibiae (Fig. 309) without sexual characters. Third tarsomere distinctly wider than second tarsomere. Claws with robust medial teeth, as long as half of claw. Male genitalia: body of penis (Fig. 366) short, in dorsal view almost parallel at sides, gradually narrowing toward apex with subacute tip (Fig. 399), in lateral view strongly curved at a right angle toward apex. Female genitalia: spermatheca (Fig. 433) with long ramus gradually narrowing at sides, distinct collum, robust nodulus and robust cornu gradually narrowing to apex; spiculum ventrale (Fig. 459) with arms joined in basal third, then slightly divergent and parallel-sided to apex.
Remarks and comparative notes. The habitus of this species is very peculiar, although it lacks unique character states. It is unclear to which other Palearctic species T. uralensis is more closely related.
Biology. This species was collected on Caragana frutex (L.) K. Koch (Karasjov 1994). We have studied some specimens collected on C. sinica (Buc’hoz) Rehder.
Distribution. This species, distributed in north-eastern Europe, Siberia and Afghanistan, was already reported from northern China (BEI HEB).
description: Published as part of Jiang, Chunyan, Caldara, Roberto & Zhang, Runzhi, 2020, The genus Tychius Germar (Coleoptera: Curculionidae: Curculioninae) in China, with description of three new species, pp. 1-62 in Zootaxa 4856 (1) on pages 10-11, DOI: 10.11646/zootaxa.4856.1.1, http://zenodo.org/record/4411319