Parametriocnemus stylatus (Kieffer)

Li, Xing, Lin, Xiao-long & Wang, Xin-hua, 2013, New species and records of Parametriocnemus Goetghebuer from China (Diptera, Chironomidae), ZooKeys 320, pp. 51-62 : 56-58

Parametriocnemus stylatus (Kieffer) Figs 4-6

Metriocnemus stylatus Kieffer, 1924: 97.

Parametriocnemus stylatus (Kieffer); Wang (2000: 638).

Meterial examined.

CHINA: Fujian Province, Wuyi Mountain, 27°43'46"N, 118°1'52"E, 1 male, 24.iv.2002, light trap, W. Bu. Fujian Province, Wuyi Mountain, 27°43'46"N, 118°1'52"E, 1 female, 30.viii.1993, light trap, X. Wang. Fujian Province, Shanghang Country, Buyun Mountain, Shiyankeng, 25°15'59"N, 116°51'50"E, 1 male, 6.v.1993, light trap, X. Wang. Beijing City, Huairong District, 40°19'15"N, 116 °37'59"E, 2 males, 15.x.1994, light trap, X. Wang. Henan Province, Luanchuan County, Longyuwan National Forest Park, 33°46'41"N, 111°37'45"E, 1 male, 10.vii.1996, light trap, J. Li. Sichuan Province, Yaan City, Yajiang River, Sandaoqiao Town, 29°53'48"N, 103°10'19"E, 1 male, 9.vi.1996, light trap, X. Wang. Sichuang Province, Yanan City, Yajiang County, 29°53'48"N, 103°10'19"E, 1 female, 14.vi.1996, light trap, X. Wang. Shannxi Province, Zhouzhi County, Banfangzi Town, 34°9'47"N, 108°13'19"E, 1 male, 7.viii.1994, light trap. X. Wang. Zhejiang Province, Tianmu Mountain, 30°18'44"N, 119°26'35"E, 2 males, 12.xi.1998, light trap. X. Wang. Yunnan Province, Eryuan County, Niujie Town, Futian Village, Meigong Stream, 26°6'40"N, 99°57'3"E, 5 males, 24.v.1996, light trap, C. Zhou. Guizhou Province, Daozhen County, Dasha River, 26°38'19"N, 108°3'41"E, 3 larvae, 23.v.2004, leg, H. Tang.

Remarks.

The male differs from other members of the genus by having AR 0.79-1.09, wing membrane with numerous setae, a rather slender gonostylus without projection, robust anal point, and gonocoxite with a broad, subrectangular inferior volsella.

According to Wang (2000), five females of this species were collected in the Yunnan Province. After re-examing the specimens, we found that all five specimens apparently are intersexes. One of these intersexes has a 10 segmented antenna, two have a 6 and two a 5 segmented antenna. They are morphologically similar to males, but differ from all species of Parametricnemus in structure of the male hypopygium and the female-like antenna, reduced number of setae on the antennal flagellum, and low antennal ratio (Figs 4-6). None of the males from the other localities appear to be intersexes.

Distribution.

The species has been recorded from the Palaearctic and Nearctic Regions and occurs in both Oriental and Palaearctic China.