Elaphropeza balinensis, Grootaert & Velde & Shamshev, 2015

Grootaert, Patrick, Velde, Isabella Van De & Shamshev, Igor V., 2015, Two new coastal species of Elaphropeza Macquart (Diptera: Hybotidae) from Bali, Indonesia, European Journal of Taxonomy 112, pp. 1-10 : 5-8

Elaphropeza balinensis sp. nov.

urn:lsid:zoobank.org:act:D744E850-5F65-4C29-A671-9F9D0872A6A9

Figs 5–10

Diagnosis

A species of the E. biuncinata group; thorax yellow, scutum with narrow, short, brownish patch above wing; antenna with short postpedicel, about 2.0 times as long as wide; legs yellow, but all tibiae and tarsi faintly brownish tinged, including apical tarsomere of all legs; hind tibia with 1 short, black anterodorsal bristle at about middle and 1 similar subapical bristle anteriorly; halter brownish. Scutum entirely covered with setae (acrostichals and dorsocentrals not differentiated), reaching base of scutellum.

Etymology

The specific epithet refers to the provenance from Bali.

Type material

Holotype

INDONESIA: ♂, Bali, Amed, Bunutan, beach, Arya Amed , 8°20’38.89” S, 115°40’21.81” E, 2 Jan. 2014, leg. P. Grootaert & I. Van de Velde ( MZB).

Paratypes

INDONESIA: 3 ♂♂ (1 ♂ dissected), 2 ♀♀, Bali, Amed, Bunutan, beach, 8°20’19.44” S, 115°39’53.39” E, 26 Dec. 2013, leg. P. Grootaert & I. Van de Velde ( RBINS).

Description

Male ( Fig. 5 )

LENGTH. Body 1.8 mm, wing 1.6 mm.

HEAD. Occiput entirely black, largely shining, with yellowish setae; inner verticals long inclinate, outer verticals short.Anterior ocellars long proclinate, posterior ocellars minute. Frons subshining, very narrow, above antennae about as broad as anterior ocellus. Antenna with scape and pedicel yellow, postpedicel and stylus brownish; pedicel with circlet of subequally short setulae; postpedicel short, nearly 2 times as long as wide; stylus with short pubescence, very long, 2.5–3.0 times as long as postpedicel. Proboscis brownish yellow. Palpus yellow, small, rounded, bearing scattered setulae, subapical seta short.

THORAX. Almost entirely yellow, scutum with narrow, short, brownish yellow patch above wing on each side (indistinct in paler specimens), metanotum slightly shadowed on middle part (sometimes only posteriorly or entirely yellow), mesopleuron posteriorly and sternopleuron on lower part usually with small, brownish yellow patch; shining, with yellowish setation; spiracles brownish yellow. Prothoracic episterna with long, upturned seta just above fore coxa. Postpronotal seta not prominent. Mesonotum with 2 long notopleurals, 1 short postsutural supra-alar, 1 moderately long postalar and 4 scutellars (apical pair long, cruciate; lateral pair short); scutum covered with uniform, minute setae, extending to base of scutellum.Acrostichals and dorsocentrals not differentiated, except for 1 pair of long, prescutellar dorsocentrals.

LEGS. Robust, yellow, but all tibiae and tarsi yellowish-brownish tinged. Coxae and trochanters with unmodified setation. Fore femur slightly thickened, with rows of minute anteroventral and posteroventral setae, long seta near base and 1 subapical bristle anteriorly. Fore tibia lacking prominent bristles (except subapicals). Mid femur with rows of minute anteroventral and somewhat longer posteroventral setae, 1 long seta near base and 1 moderately long subapical bristle anteriorly. Mid tibia with row of black, short, anteroventral spines on apical ¾, lacking prominent setae (except subapicals). Hind femur with minute anteroventrals and 3 erect, dorsal setae near base. Hind tibia with 1 short, black anterodorsal bristle on about middle and 1 similar subapical bristle anteriorly. Tarsi of all legs unmodified, with unmodified setation.

WINGS. Normally developed, finely infuscate, covered with uniform microtrichia; veins mostly yellowish brown; basal section of M 1+2, crossveins bm-cu and r-m pale. Costal vein with moderately long, uniform setulae along anterior margin. Costal bristle moderately long, brown. Costal index: 29/22/26. Vein Rs long, nearly as long as crossvein bm-cu. Vein R 2+3 evenly bowed. Veins R 4+5 and M 1+2 somewhat divergent near wing apex, both slightly bowed. Vein CuA 1 reaching wing margin. Vein A 1 lacking. Crossvein bm-cu oblique. Crossvein r-m near middle of cell bm. Squama yellowish brown, with long, brownish setae. Halter brownish.

ABDOMEN. Tergite 1 largely pale yellow, very narrow, divided medially; tergite 2 broadly concave medially, undivided; tergite 3 broadest, subrectangular, with squamiform setae; tergites 4–5 narrow, both with squamiform setae; tergites 6–7 broader than tergite 5, the latter with moderately long, posteromarginal setae; sternites 3–4 broadly divided, sternite 5 entire, concave anteriorly, sternites 6–7 entire, subrectangular, with scattered minute setae. Gland-like structure present between tergites 3–4 and 4–5, plate-like. Terminalia ( Figs 6-10 ) rather small; epandrium brown, otherwise yellow. Right epandrial lamella ( Fig. 6 ) with base brown, apex (surstylus) yellowish; basal half of dorsal margin with 4 long, strong setae. Left epandrial lamella without the usual set of setae dorsally. Left surstylus composed of 3 pieces ( Fig. 10 ), hidden by the large left cercus: ls1 with apex indented ( Fig. 9 ), on inner side with at least 6 setae; ls2 with apex saw-toothed; ls3 with short setae ( Fig. 10 ). Phallus long, with partly coiled tip ( Fig. 8 ). Right cercus short, with rather long setae. Left cercus very wide, covering the left surstylus; with only minute setae.

Female

Similar to male but mid tibia without anteroventral spines; abdominal tergites 3–7 of subequal width; segment 8 short, tergite 8 separated from sternite 8, deeply cleft posteriorly; cercus short, yellowish.

Distribution

Bali, Indonesia.

Remarks

In the key of Grootaert & Shamshev (2012), E. balinensis sp. nov. resolves closest to E. monospina Shamshev & Grootaert, 2007 , known only from Singapore. The latter also has a somewhat maculated scutum, but it has the hind tarsomere 1 with a spine-like ventral seta near the base. The structure of the male genitalia is also very different.

Figures

Fig. 5. Elaphropeza balinensis sp. nov. Male habitus (photo J. Brecko).

Figs 6–10. Elaphropeza balinensis sp. nov. Male terminalia. 6. Right epandrial lamella. 7. Detail of right surstylus. 8. Epandrium with cerci. 9. Left surstylus, ls1. 10. Left surstylus. lc = left cercus; ls1, ls2, ls3 = 3 sclerites of the left surstylus; ph = phallus; rc = right cercus. Scale bar = 0.1 mm.