Burmagomphus divaricatus Lieftinck, 1964

Zhang, Hao-Miao, Kosterin, Oleg E. & Cai, Qing-Hua, 2015, New species and records of Burmagomphus Williamson, 1907 (Odonata, Gomphidae) from China, Zootaxa 3999 (1) : -

Burmagomphus divaricatus Lieftinck, 1964

Figures 42–43

Burmagomphus arboreus (nec. Lieftinck 1940)— Zhang, 2010 (Xishuangbanna, Yunnan Province, China); Yang & Davies 1993 (Gengma County, Malipo County, Monghai [correct spelling Menghai] County, Yipinglang and Jiangcheng County, Yunnan Province, China).

Material examined. 1♂, Xishuangbanna National Nature Reserve (21°57’59’’N, 101°12’37’’E), altitude 630 m, Menglun Town, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China, 0 1 June 2013, Hao-miao Zhang leg.; 1♀, the same site and collector, 0 2 June 2013; 1♂, the same site and collector, 0 4 October 2014; 1♂, Boliehe River, Zhenyuan County, Puer City, Yunnan Province, 0 1 October 2014, Hao-miao Zhang leg.; 2♂, Dayingjiang River, Yinjiang County, Dehong Dai and Jingpo Autonomous Prefecture, Yunnan Province, China, 0 1 July 2014; 1♂, 3♀, the same site and collector, 0 2 July 2014.

The species was first recorded from China by Yang & Davies (1993), and it is now confirmed to be widely distributed in Yunnan Province. Females of this species possess two pairs of spines behind the lateral ocelli. The five males collected lack additional denticles on the posterior angle of the posterior hamulus, specific to B. arboreus and occurring in B. divaricatus in East Cambodia ( Kosterin 2014 and in prep.). Only one of these males has a clear spine on S9, claimed to be diagnostic by the describer ( Lieftinck 1964) but appeared variable in males from Laos ( Asahina 1977) and Cambodia ( Kosterin 2014).

Distribution. China (Yunnan: Xishuangbanna, Puer, Dehong), Thailand ( Hämäläinen & Pinratana 1999), Cambodia (Kosterin 2012, 2014), Laos ( Asahina 1977), South Vietnam (Karube 2014) and Malay Peninsula ( Lieftinck 1964).

Figures

FIGURES 40 – 49. Living photos of Chinese Burmagomphus: (40) B. asahinai, male, Xishuangbanna Tropical Botanic Garden, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, 0 4 June 2013; (41) same species, female, same data; (42) B. divaricatus, male, Xishuangbanna National Nature Reserve, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China, 0 2 July 2014; (43) same species, female, same data; (44) B. collaris, male, Shidu, Fangshan, Beijing City, China, 14 August 2014; (45) same species, female, same data; (46) B. intinctus, male, Jingning, Lishui City, Zhejiang Province, China, 13 July 2013; (47) same species, female, same data; (48) B. williamsoni, male, Xishuangbanna Tropical Botanic Garden, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, 0 4 June 2013; (49) same species, female, same data; all photos are taken by Hao-miao Zhang.