Empis (Xanthempis) adanaensis, 2019

Shamshev, Igor V. & Barták, Miroslav, 2019, New and little-known species of Empis (Diptera: Empididae) from Bulgaria, Israel and Turkey, with keys to the Palaearctic Pachymeria and the Mediterranean Xanthempis, Zootaxa 4555 (1), pp. 91-100 : 95-97

Empis (Xanthempis) adanaensis sp. nov.

( Figs 5, 6 )

urn:lsid:zoobank.org:act:1CB35111-B87C-4EC9-B6BA-3B40B072348C

Type material. HOLOTYPE , ♂ labelled: “TR [= TURKEY]: Adana Province / Yumurtalik county ,/ 36°44´N, 35°37´E / 12.–17.iv.2007, 10 m” (CULSP). PARATYPES: same data as holotype (1 ♂, 2 ♀, CULSP; 1 ♂, ZIN) .

Diagnosis. Occiput indistinctly brownish yellow on upper part; antenna with scape and pedicel brownish yellow; mesoscutum with narrow brownish median vitta, anterior spiracle yellow, 1 postsutural supra-alar seta; abdomen entirely yellow, hypandrium with numerous thin setae apically.

Description. Male ( Fig. 5 ). Body 5.2 mm, wing 6.0– 6.2 mm. Head extensively yellow, greyish pollinose, with black setation; ocellar tubercle brownish, occiput rather indistinctly broadly brownish yellow on upper part behind ocellar tubercle. Ocellar setae missing. Occiput with transverse row of longer setae above neck, 2 pairs of similar setae behind ocellar tubercle laterally and numerous short setae on upper part medially, postoculars minute. Antenna with scape and pedicel brownish yellow, postpedicel and stylus black; scape elongate, about 4 x longer than wide; postpedicel 5–5.5 x longer that wide near base; stylus one third as long as postpedicel. Proboscis with labrum yellow (except brownish tip), 2 x head height; palpus yellow, whitish pubescent, with several dark setulae.

Thorax almost entirely yellow, only mesoscutum with median narrow brownish vitta occupying about 1/3 of space between rows of dorsocentrals and disappearing before prescutellar depression; with black setation. Prosternum bare. Proepisternum with several dark minute setulae. Antepronotum bilobed, with 8–10 setae of different lengths on each side. Postpronotal lobe with 1 long and several short setae. Mesonotum with 1 presutural intra-alar, 1 presutural supra-alar, 1 long and 1–2 short notopleurals, 1 postsutural supra-alar, 1 postalar, 2 scutellars; additionally, notopleuron with several setulae anteriorly; acrostichals present or absent; dorsocentrals more or less uniserial. Laterotergite with 6–7 setae of different lengths. Anterior and posterior spiracles yellow.

Legs long, slender, almost entirely yellow, only tarsomeres 5 brown; with black setation. Fore femur bare ventrally; fore tibia with 3 dorsal setae (as long or slightly shorter than tibia diameter). Mid and hind femora covered with dense setulae ventrally, hind femur slender throughout; mid and hind tibiae without prominent setae (except circlet of short subapicals), 1 short but distinct seta in comb at tip of hind tibia. All tarsomeres unmodified, covered with simple setulae (except circlet of somewhat longer subapicals).

Wing membrane hyaline; veins somewhat yellowish at base, otherwise brownish, complete (except Sc), well sclerotised. Stigma indistinct, brownish yellow to yellow. Anal lobe slightly obtuse. Calypter yellow, black fringed. Halter yellow.

Abdomen entirely yellow, covered with short, thin, black setae more distinct on tergites 1–3; tergites subshiny, sternites denser greyish pollinose. Segment 8 with tergite and sternite almost entirely fused. Terminalia ( Fig. 6 ) almost entirely yellow, only cercus narrowly brownish along upper margin, with black setation; cercus with very short anterodorsal projection, bearing subequally short marginal setae; epandrial lamella rather subrectangular (lateral view), with lower posterior corner strongly prolonged downwards; hypandrium elongate, with rounded apex, covered with numerous thin setae apically; phallus somewhat broadened on middle portion, slightly curved subapically, with short, truncate apex.

Female. Body 6.4–6.7 mm, wing 6.7–7.0 mm. Very similar to male, acrostichals absent. Abdomen with last segment and cercus brown. One female paratype with narrower dark stripe on mesoscutum than in other specimens.

Etymology. The name of the new species refers to the name of the province Adana of Turkey, where it was collected.

Differential diagnosis. The new species belongs to a small complex of Xanthempis species that have the hypandrium of the male terminalia elongated and covered with numerous setae. This group includes: E. aequalis Loew ; E. laeta Loew and E. hypandrialis Daugeron (Daugeron 2000) . However, E. adanaensis sp. nov. can be readily distinguished from all these species primarily by a narrow mesoscutal vitta, presence of a postsutural supraalar seta and entirely yellow abdomen. In E. aequalis , E. laeta and E. hypandrialis , the mesoscutal vitta occupies the entire space between rows of dorsocentral setae, the postsutural supra-alar seta is absent and the abdominal tergites are brown dorsally.

Distribution. Palaearctic: Turkey ( Fig. 7 ).

Figures

FIGURE 7. Distribution of Empis (Pachymeria) vikhrevi sp. nov., Empis (Xanthempis) adanaensis sp. nov. and E. (X.) testiculata Bezzi in the Palaearctic Region.

FIGURES 5, 6. Empis (Xanthempis) adanaensis sp. nov., male, paratype. 5. habitus, lateral view; 6. terminalia, lateral view. Abbreviations as in Fig. 4.