Psilarthroides czerskyi (Zaslavskij)

Prena, Jens, Yang, Jiani, Ren, Li, Wang, Zhiliang, Liu, Ning & Zhang, Runzhi, 2014, Nomenclatural changes, new country records and range extensions of Baridinae (Coleoptera, Curculionidae) from China, Zootaxa 3841 (3), pp. 339-363 : 351

Psilarthroides czerskyi (Zaslavskij)

( Figs. 12 , 21 )

Baris czerskyi Zaslavskij, 1956: 365 .

Holotype male, Tumen River, Primorsky Kraj, Russia ( ZIN); not examined. Transferred to Psilarthroides by Hong et al. (2000).

Baris (Labiaticola) laferi Egorov, 1978: 158 .

Holotype male, Sukhodol, Shkotovsky Rayon, Primorsky Kraj, Russia ( ZIN); not examined. Synonymized with P. czerskyi by Hong et al. (2000).

Baris humuli Morimoto & Miyakawa, 1985: 42 .

Holotype male, Tokyo, Japan ( KUEC); not examined. Synonymized with P. czerskyi by Hong et al. (2000).

Diagnosis. Psilarthroides czerskyi ( Fig. 12 ) is a small (2.0–3.5 mm), elongate, glabrous species with paired prosternal pits, slender legs and subconnate claws. A few undescribed species with these traits have a smaller pronotum and occur generally in S China. Psilarthrus coracinus Marshall is larger, has indistinct prosternal pits, basally separate claws and occurs further south (Yunnan, Tibet, Myanmar). Females have a much longer rostrum than males and may be mistaken for a different species. Males have a median process on the fifth ventrite that locks the pygidium.

Distribution. The species has been reported from the Russian Far East ( Zaslavskij 1956), Japan ( Morimoto & Miyakawa 1985), South Korea ( Morimoto & Lee 1992) and NE China ( Prena 2011). We document here its occurrence in Anhui, Beijing, Chongqing, Fujian, Gansu, Hebei, Heilongjiang, Henan, Jilin, Shaanxi, Shandong and Zhejiang ( Fig. 21 ).

Biology. The species is associated with Humulus japonicus 1 ( Cannabaceae ) throughout its range ( Morimoto & Miyakawa 1985; Hong et al. 2000; own observations). Associations with the introduced Humulus lupulus and the closely related Cannabis sativa are unknown at present. Adults appear shortly after the emergence of the plant during May or early June and feed on fresh growth. All weevils found in late August were fully sclerotized and do not appear to belong to the new generation. We found two larvae in galls at internodes but their cox1 sequence did not match. Other gall inducers on the same plant were the ceutorhynch Cardipennis sulcithorax (Hustache) and the tortricid moth Grapholita delineana (Walker) .

Material examined. CHINA. Anhui: Hefei, 13.v.1991 ( IZCAS 1). Beijing: numerous sites, 16.vii.1961, 2.viii.1980 (3x), 30.vii.2006 (4x), 26.vii.2007, 14/ 15.vi.2008 (9x), 30.v.2010 (9x), 8.vii.2013, 12.vii.2013 (3x), 17.vii.2013, 21.viii.2013 (3x) ( IZCAS 35). Chongqing: Huayingshan, 5.vii.1998 ( JPPC 1). Fujian: Guangze, 13.viii.1937 ( AKMB 2) ; Shaowu, 10.v.1937 (2x), 12.v.1937 ( AKMB 3). Gansu: Jiuquan, 21.vii.1962 ( IZCAS 1). Hebei: Little Wutai Mountain, Yangjiaping, Wei County, 20.viii.2005 ( IZCAS 5). Heilongjiang: Yuquan, Acheng, 30.vi.1941 ( IZCAS 1). Henan: Jinglonggong, Fengqiu, Xinxiang, 17.vii.2007 ( HBU 1) ; Shangbali, Hui County, 27.vii.2006 ( IZCAS 1). Jiangsu: Yinjiang Bridge, Jiangdu District, Yangzhou, 6.viii.2013 ( KEIU 2). Jilin: Fenggong, 27.vi.1963 ( IZCAS 1). Shaanxi: Foping Longcaoping, Qinling, 3.vii.2008 ( IZCAS 1) ; Houzhenzi, Qinling, 1.v.2008 ( IZCAS 2) ; Laoxiancheng, Zhouzhi, Qinling, 27.vi.2008 ( IZCAS 1) ; Mengyuan, 8.viii.1972 ( IZCAS 1) ; Niubeiliang National Forest Park, 15.vii.2013 ( IZCAS 1) ; Pingheliang, 13.viii.2013 ( IZCAS 3) ; Wugong, VI/1957 ( IZCAS 1) ; Yicheng, Linfen, 27.vii.2012 ( IZCAS 1) ; Zhouzhi Houzhenzi, Qinling, 23.vi.2008 ( IZCAS 6). Shandong: Pingyi, Linxi, 13.v.2007 ( HBU 1). Zhejiang: Chanyuan Temple, West Tianmu Moutain, Lin'an, Hangzhou, 2.vii.2009 ( IZCAS 1) ; Hangping, Yantou, 3.vii.2006 ( IZCAS 1) ; Jiayelu, Nanxun District, 7.vii.2012 ( IZCAS 1) ; Jili Village, Nanxun District, 7.vii.2012 ( IZCAS 1) ; Lin'an City, 23.vii.2012, 6.viii.2012 ( IZCAS 2) ; Sanbushi, Yantou town, 26.vii.2005 ( IZCAS 2) ; Zhongjie village, Jindong District, 13.vii.2012 ( IZCAS 1) ; Changzenglu, Nanxun District, 8.vii.2012 ( IZCAS 1). JAPAN. Tochigi Pref.: Fujioka Town, 17.v.1998 ( JPPC 1). Kanagawa Pref.: Kanagawa, 8.vii.1906 ( MNKB 1) ; Yokohama, 14.viii.1906 ( MNKB 1). Tokyo Pref.: Tokyo ( MNKB 2). RUSSIA. Primorsky Kraj: Chernigovka ( USNM 2) ; Mramornaya, Chasan Rayon, 16.–18.viii.1993 ( MNKB 2).

Figures

FIGURES 9 – 12. Dorsal and lateral habitus images. 9, Mimophilus tragicus, 7.8 mm, West Garo Hills (India). 10, Moreobaris deplanata, 3.9 mm, Linhai (Zhejiang). 11, Pellobaris melancholica, 3.7 mm, Taipingshien (Anhui). 12, Psilarthroides czerskyi, 2.9 mm, Zhouzhi Houzhenzi (Shanxi).

FIGURES 21 – 22. Map of mainland China and surrounding countries showing distribution of Psilarthroides czerskyi, Mimophilus tragicus, Moreobaris deplanata and Ulobaris kuchenbeisseri.