Species turnover between the northern and southern part of the South China Sea in the Elaphropeza Macquart mangrove fly communities of Hong Kong and Singapore (Insecta: Diptera: Hybotidae) Author Grootaert, Patrick text European Journal of Taxonomy 2019 2019-09-19 554 1 27 journal article 25287 10.5852/ejt.2019.554 9b0003a0-e8c3-4b11-b1e0-06612e1e0307 3476113 369BE0D6-70EC-4653-93A2-194246F8915E Elaphropeza hongkongensis sp. nov. urn:lsid:zoobank.org:act: 8FDF0480-372A-4135-A1C4-FA4551C274E5 Figs 8–9 Etymology The new species was the most abundant species during our study and it is therefore named after Hong Kong . Material examined Holotype HONG KONG • ♂ , Tung Chung (14M1); 22.28125° N , 113.92890° E ; C. Taylor and U. Chang leg.; 18–25 Oct. 2017 ; dissected and figured ( Figs 8–9 ); RBINS . Paratypes HONG KONG • 4 ♂♂ ; same collection data as for holotype; RBINS • 7 ♂♂ ; Sam A Chung (5 AM1 ); 22.50829° N , 114.27248° E ; C. Taylor and U. Chang leg.; 11 Nov.–27 Dec. 2017 ; all males with fore tibia ventrally brownish; RBINS • 1 ♂ ; Tung Chung (14M1); 22.28125° N , 113.92890° E ; C. Taylor and U. Chang leg.; 18–25 Oct. 2017 ; RBINS • 1 ♂ , 2 ♀♀ ; Tung Chung (14M2); 22.28125° N , 113.92890° E ; C. Taylor and U. Chang leg.; 25 Oct.–2 Nov. 2017 ; with barcode references: HKC0000815 ♀ , HKC0000818 ♀ , HKC0000813 ♂ ; RBINS • 2 ♂♂ , 2 ♀♀ ; Hang Mei (17 BM1 ); 22.25273° N , 113.86829° E ; C. Taylor and U. Chang leg.; 27 Oct.–9 Nov. 2017 ; 2 females with black sternite 10; RBINS • 2 ♂♂ , 6 ♀♀ ; Tai O (17 AM1 ); 22.24918° N , 113.86307° E ; C. Taylor and U. Chang leg.; 27 Oct.–9 Nov. 2017 ; RBINS • 1 ♂ , 1 ♀ ; Tai O (17 AM1 ); 22.25790° N , 113.86360° E ; C. Taylor and U. Chang leg.; 20 Oct.–2 Nov. 2017 ; RBINS • 1 ♂ , 1 ♀ ; Tai O (17 CM1 ); 22.25790° N , 113.86360° E ; C. Taylor and U. Chang leg.; 20 Oct.–2 Nov. 2017 ; RBINS • 1 ♀ ; Wong Chuk Wan (34M1); 22.39563° N , 114.28617° E ; C. Taylor and U. Chang leg.; 5–19 Dec. 2017 ; barcode reference HKC0000954; RBINS • 1 ♂ , 5 ♀♀ ; Ho Chung (38 BM1 ); 22.35366° N , 114.25207° E ; C. Taylor and U. Chang leg.; 4 Dec. 2017 ; barcode references: HKC0000752 ♀ , HKC0000753 ♀ , HKC0000988 ♀ , KC0000750 ♀ , HKC0000756 ♂ , HKC0000757 ♀ ; RBINS . Description Male ( Fig. 8 ) BODY. 1.7 mm long; wing 1.6 mm long ( holotype ). HEAD. Occiput black; verticals yellow, inner vertical bristle long, outer one less than half as long as inner one. Postpedicel brownish in apical part and yellow basally, nearly 3.5 × as long as wide, stylus a little longer than scape, pedicel and postpedicel together. Fig. 8. Elaphropeza hongkongensis sp. nov. , holotype, ♂, habitus, RBINS (leg. C. Taylor and U. Chang; photo A. Samoh). THORAX. Yellow, but scutellum and metanotum black; acrostichals irregular tri-serial at base, becoming biserial near middle, not reaching the border of the scutellum. Only one pale brownish long prescutellar. LEGS. Yellow with apical tarsomere of all legs black. Fore femur with a brown preapical posteroventral bristle as long as femur is wide. Mid femur with a double row of ventral spinules, anterior row shorter than posterior row. Mid tibia ventrally with a row of short, fine, spine-like bristles ending in a subapical, brown, claw-like spine; hind tibia with one strong brown anterodorsal bristle. ABDOMEN ( Fig. 8 ). Tergites 2–3 pale, yellowish; tergite 4 large, black with yellow hairs; tergite 5 very narrow apically, with short squamiform setae, tergites 6 and 7 yellow. TERMINALIA ( Fig. 9 ). Base of right epandrial lamella largely yellow, apical part yellow; cerci brown; dorsal half of surstylus yellowish brown, ventral half almost black. Cerci narrowly fused with right cercus small, left cercus very large ( Fig. 9B ). Left surstylus large, with a deep notch on dorsal border ( Fig. 9C ). Female BODY. 2–2.3 mm long; wing 1.6–1.7 mm long. Similar to male. Abdominal segment 8 enlarged. Remarks This species is similar to E. feminata Shamshev & Grootaert, 2007 in most aspects. However, the notch on the dorsal side of the left surstylus is in a different position than in E. feminata . In the latter, it is a shallow notch on the apical border while in E. hongkongensis sp. nov. it is a deeper notch on the dorsal border.