Tychius ovalis Roelofs 1875
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 ovalis

description: 12. Tychius ovalis Roelofs, 1875
(Figures 29–32, 153–156, 259–260, 315, 372, 405, 438, 464)
Tychius ovalis Roelofs, 1875: 171. Caldara, 1990: 142.
Neotychius kaszabi Bajtenov, 1977: 159. Caldara, 1990: 142 (Tychius).
Material examined. CHINA: Beijing: Badaling, 8-IX-1980, leg Subai Liao (1); same data, 20-VI-1963, leg Tiesheng Li (1); same data, 24-VII-1963, leg Tiesheng Li (1); same data, 29-8-1975, leg Yuanqing Chen (1); Badaling (570 m), 6-VIII-1962 (1); Changling, 30-VIII-1957 (2); Changling Xigou, 25-VII-1972 (1); Juyongguan (600 m), 20-V-1964, leg Tiesheng Li (1); Mentougou Liyuanling, 26-29-VIII-1999, leg Xiaodong Yu (2); Sanpu (600 m), 17-VIII-1964, leg Tiesheng Li (2); same data, 18-VIII-1964, leg Tiesheng Li (1); same data, 19-VIII- 1964, leg Tiesheng Li (1); same data, 21-V-1964, leg Tiesheng Li (1); same data, 22-VIII-1964, leg Tiesheng Li (1); Shangfangshan, 25-VII-1972, leg Yuanqing Chen (1); Shisanling, 30-VIII-1957 (1); Xiangshan, 11-VIII-1972 (1); same data, 14-IX-1964, leg Subai Liao (2); same data, 15-VIII-1967, leg Shuyong Wang; Xiangshan, 21- V-1964, leg Subai Liao (1); Xiangshan, 22-VII-1972, leg Wenzhen Ma (1); same data, 30-V-1964, leg Tiesheng Li (1); 31-VIII-1972 (1); Xiangshan (600 m), 17-VIII-1964, leg Tiesheng Li (9); same data, 18-VIII-1964, leg Tiesheng Li (1); same data, 19-VIII-1964, leg Tiesheng Li (13); same data, 21-VIII-1964, leg Tiesheng Li (4); same data, 22-VIII-1964, leg Tiesheng Li (4); Xibeiwang, 4-VIII-1958 (6); Yanqing, 4-VII-1973, leg Peiyan Zhou (1). Hebei: Weixian Baile (920 m), 1-IX-1964, leg Yinheng Han (1); Xiaowutaishan (1500 m), 08-VIII-1964, leg Bingqian Li (3); same data, 10-VIII-1964, leg Bingqian Li (3); same data, 25-VIII-1964, leg Bingqian Li (2); same data, 28-VIII-1964, leg Bingqian Li (32); Xiaowutaishan Beitai (1500-2700 m), 16-VIII-1964, leg Bingqian Li (1); Xiaowutaishan Huichuan (1400m), 14-VII-1964, leg Bingqian Li (1); same data, 16-VII-1964 (1); same data, 28- VI-1964 (1); same data, 14-VII-1964 (1); Weixian Baile (920 m), 3-VIII-1964, leg Yinheng Han (1); Zhangjiakou, Huailai, Xiaonanxinpu, dingzhouying (40°20’N; 115°44’E, 497m), 19-VI-2019, leg Run Zhou (1). Heilongjiang: Haerbin, 18-VI-1951 (1). Hunan: Shimenhu Pingshan (1500m), 29-VI-1987 (1). Inner Mongolia: Humeng Zhaqi, 17-VIII-1986, leg Shi Guo (1); Keerqin Menggehanshan, 1960 (1); Ximeng Abahanaerqi, 23-VII-1972 (5). Jiangxi: Wugongshan, 25-VII-1955, leg Zhongshan Lu (1); 1960 (1). Jilin: Jilin Beishan, 25-VI-1963, leg Hongxing Li (1). Shaanxi: Shangluo Shanyang Chengguan Xiaodonggou (33°36’N; 109°53’E, 893 m), 7-VIII-2014, leg Chunyan Jiang (1); same data, 6-VIII-2014 (1); Ankang Xunyang Bailiu Qianping (32°56’N; 109°18’E, 580 m), 3-VIII-2014, leg Chunyan Jiang (1). Shanxi: Wutai Shiju (1200 m), 7-VI-1964, leg Tiesheng Li (1).
Redescription. Length 1.90–2.35 mm (Fig. 29–32). Integument blackish brown except for reddish apical half of rostrum, antennae and legs; on dorsum densely covered with whitish to light brown scales arranged in doubletriple row on elytral interstriae and seta-like brown scales in single median row. Rostrum (Fig. 153–156) slightly curved (Rl/Rw 4.33–4.38 in male, 4.63–4.69 in female; Rl/Pl 0.80–0.93 in male, 0.90–1.00 in female), moderately tapered from base to apex. Antennal funicle 7-segmented. Eyes convex, distinctly prominent. Pronotum transverse (Pw/Pl 1.13–1.28), with weakly rounded sides in basal half, widest at middle. Elytra oval (El/Ew 1.20–1.33; Ew/Pw 1.27–1.42), with somewhat rounded sides from base, widest in basal half. Femora (Fig. 259–260) with indistinct tooth. Profemora and protibiae (Fig. 315) without sexual characters. Claws with robust medial teeth, as long as 3/4 of claw. Male genitalia: body of penis (Fig. 372) slightly constricted at middle, narrowed only until near apex, with blunted tip (Fig. 405), as long as half of apodeme. Female genitalia: spermatheca (Fig. 438) with indistinct ramus and collum, robust nodus, robust cornu narrowed until near apex; spiculum ventrale (Fig. 464) with arms joined from base to apex.
Remarks and comparative notes. This species was placed in a monobasic group by Caldara (1990) based on the shape of the male genitalia, mainly due to the uncommonly long apophysis of the penis and the spermatheca possessing indistinct ramus and collum. It seems to be one of the most common species in the oriental Palearctic countries, where it is easily distinguishable from the other species by its small size, notwithstanding genitalia, combined with the pattern of the elytral vestiture.
Biology. No data are available.
Distribution. Widely distributed throughout eastern Asia (Siberia, Mongolia, Korea, Japan) including China (FUJ GUX HEB SHX TIA); new records from Northeast China (HEI JIL NMO), North China (BEI), East China (JIX), Central China (HUN) and Northwest China (SHA).
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 16-17, DOI: 10.11646/zootaxa.4856.1.1, http://zenodo.org/record/4411319