Elaphropeza guenardi, Grootaert, 2019

Grootaert, Patrick, 2019, 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), European Journal of Taxonomy 554, pp. 1-27 : 11-13

Elaphropeza guenardi sp. nov.

urn:lsid:zoobank.org:act:FC83E430-3761-4BD4-B4D9-82663F8CEFE8

Figs 6–7

Etymology

The new species is dedicated to Prof. Benoit Guénard from Hong Kong University, who ran the entomological part of the survey of the mangroves of 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 drawn ( Fig. 6 ), with barcode reference JP1 A; RBINS.

Paratypes

HONG KONG • 1 ♂; same collection data as for holotype; RBINS • 1 ♂; Sam A Tsuen (5 AM1 ); 22.51534° N, 114.27121° E; C. Taylor and U. Chang leg.; 11–27 Dec. 2017; RBINS .

Description

Male ( Fig. 7 )

BODY. 1.2 – 1.5 mm long; wing 1.3 mm long.

HEAD. Occiput black, a pair of long pale ocellars.A single pair of long pale verticals (outer pair indistinct). Antenna with scape and pedicel yellow, postpedicel and stylus brown. Postpedicel 4.6× as long as wide; stylus nearly as long as postpedicel (0.8 ×). Palpus rounded at base, but tip pointed, yellow with pale bristles.

THORAX. Entirely orange yellow including scutellum and metanotum. Acrostichals and dorsocentrals multiserial, acrostichals reaching the border of the scutellum. A single prescutellar dorsocentral. Two notopleurals.

LEGS. Entirely yellow, except for dusky yellow fore tibia and tarsus and tarsomere 5 of all legs. Mid femur with minute fine ventral bristles only, as well as mid tibia. Hind tibia with a pale brown anterodorsal before middle, ventrally set with long white hairs, nearly as long as tibia is wide. Hind tarsomere 1 long and a little inflated, ventrally with pale brownish bristles nearly as long as the tarsomere is wide.

WING ( Fig. 7 ). Haltere not white, but dusky.

ABDOMEN. Tergites 2–3 light brownish, tergite 4 black, densely set with pale squamiform bristles, tergite 5 black, narrow, with a row of small squamiform bristles. Tergites and sternites 7 and 8 brown.

TERMINALIA ( Fig. 6 ). Cerci fused at tip, fused part short, pointed, bearing a few long setae ( Fig. 6B ). Right epandrial lamella with truncate tip, produced into a point on right side. Apical border bearing three black tooth-like spines ( Fig. 6A ). Left epandrial lamella fused with hypandrium, bearing five distinct setae ( Fig. 7B ). Left surstylus with a pair of long setae at base and tip with a shallow indentation ( Fig. 7C ).

Female

Unknown.

Remarks

The new species is closely related to E. asiophila Shamshev & Grootaert, 2007 . The differences are mainly in the male terminalia. Elaphropeza guenardi sp. nov. has three black, tooth-like spines on the apex of the right epandrial lamella, while there are only two spines in E. asiophila . The apex of the fused part of the cerci is longer in E. asiophila and the shape of the left surstylus and bristling is different. Moreover, the species differs in 4.5% of the barcode.

In the key of Shamshev & Grootaert (2007), E. guenardi sp. nov. will key out as E. ubinensis Shamshev & Grootaert, 2007 because the postpedicel is 4.6× as long as wide and the stylus is longer in both species than in E. asiophila . However, E. ubinensis has a brownish metanotum that is yellow in both E. guenardi sp. nov. and E. asiophila . In E. ubinensis the fused tip of the cerci is long and bears long strong spines.

Figures

Fig. 6. Elaphropeza guenardi sp. nov., holotype, male terminalia (leg. C. Taylor and U. Chang; RBINS). A. Right epandrial lamella. B. Epandrium dorsal view. C. Left surstylus. Barcode reference JP1A. Scale bar: 0.1 mm.

Fig. 7. Elaphropeza guenardi sp. nov., holotype, ♂, habitus, RBINS (leg. C. Taylor and U. Chang; photo A. Samoh).