Gomphidae of Guangdong & Hong Kong, China (Odonata: Anisoptera) 2177 Author Wilson, Keith Duncan Peter Author Xu, Zaifu text Zootaxa 2009 2009-08-06 2177 1 62 journal article 1175­5334 Davidius fruhstorferi Martin 1904 Figs. 3 (a–f) Davidius fruhstorferi Martin 1904 : Martin (1904: 215 , type-loc. Tonkin ); Chao (1995: 17–19 , 32–35, figs 2, 10–11, 16, 30, 34, 36, 41, 46–47, synonymy with D. guizhouensis , D. junior , D. serenus , D. simaoensis , Fujian , Guangxi , Henan , Jiangxi , Sichuan , Vietnam , Yunnan ); Wilson (2005: 133 , 167, fig. 37, Guangxi, photo ♂ Guangdong) ; Hämäläinen & Pinratana (1999: 78 , northwest Thailand ). Davidius trox nec Needham 1931: Asahina (1990: 14–15 , figs 32–34, ♀ , northwest Thailand ). Gomphus junior Navás 1936 : Navás (1936: 38–39 , type –loc. Jiangxi). Davidius serenus Needham 1941 : Needham (1941: 154 , type-loc. Jiangxi); Hua (2000: 11 , Jiangxi). Davidius fruhstorferi junior ( Navás 1936 ) : Chao (1954: 244–247 , figs 370–381, in part); Sui & Sun (1984: 91–92 , figs 60a–d, in part Fujian , Jiangsu , Sichuan ); Chao (1990: 274–278 , figs 1–14, in part, illustrations of ♀ postgenital plate are D. truncus ); Zhang (1999: 228–229 , figs 24.53a–j, Fujian , Guangxi , Jiangxi , Jiangsu , Sichuan & Zhejiang ); Hua (2000: 10, Fujian, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan & Zhejiang ); Fellowes et al. (2003a: 36 , Guangdong : Nanling). Davidius fruhstorferi serenus Needham 1941 : Asahina (1956: 222 , in part Zhejiang ). Davidius fruhstorferi guizhouensis Chao & Liu in Chao 1990 : Chao & Liu (1990: 278–279, figs 1–10, type-loc. Guizhou ); Hua (2000: 11 , Guizhou ); Chan et al. (2004a: 39 , Guangdong : Sanyue). Davidius fruhstorferi simaoensis Zhou in Zhou & Wu 1992 : Zhou in Zhou & Wu (1992: 399–400 , figs 31–33, type-loc. Yunnan ). FIGURE 3(a–h): Davidius . [a–e] Davidius fruhstorferi , Guangdong ♂—(a) caudal genitalia, dorsal, (e) caudal genitalia, lateral, (c) caudal genitalia, end on view, (d) synthorax and basal abdomen, lateral; [e–f] Davidius fruhstorferi , from Chao (1995) —(e) ♂, penile organ, lateral, (f) ♀, subgenital plate; [g–h] Davidius truncus from Chao (1995) —(g) ♂, penile organ, (h) ♀, subgenital plate. Specimens: 1 ♂ , Mangshan , Shikengkong ( Babaoshan ), 26 vi 2000 , coll. KW ; 8 ♂ , 4 ♀ , Xiaohuangshan , Shikengkong ( Babaoshan ), 27 vi 2000 , coll. KW ; 3 ♂ , 1 ♀ , Pengshan ( Dadingshan ), 1 vii 2000 , coll. KW ; 1 ♂ , Longtanjiao , 3 vii 2000 , coll. KW ; 2 ♂ , 21 iv 2001 , Sanyue, leg. GR; 1 ♀ ( No. 20205), 13 iv 2002 , Liuqihe , coll. ZX ; 1 ♂ ( No. 20861), Guozhou , 5 v 2002 , coll. ZX . Remarks: The only other species of Davidius known from S China is D. truncus Chao 1995 , from Fujian , Jiangxi and Zhejiang . According to Chao (1995) the markings of the two species are similar but they can be separated by the shape of the penile organ. In D. truncus ( Fig. 3g ) the vescicle has an angulated rim not present in D. fruhstorferi , the basal portion of the apical segment is globular not elongate, and the apex of the trumpet-like apical segment is heart-shaped as opposed to round in D. fruhstorferi ( Fig. 3e ). The postgenital plates are distinctive; D. fruhstorferi with long vulvar scales ( Fig. 3f ) in contrast to D. truncus which has short, truncated vulvar scales ( Fig. 3h ). Distribution: China ( Fujian , Guangdong , Guangxi , Guizhou , Henan , Hubei , Hunan , Jiangsu , Jiangxi , Sichuan , Yunnan , Zhejiang ), Thailand and Vietnam .