Iteaphila stentor (Melander) Sinclair & Shamshev, 2021

Sinclair, Bradley J. & Shamshev, Igor V., 2021, World revision of Iteaphila with unbranched radial vein (Diptera: Empidoidea: Iteaphilidae), Zootaxa 4968 (1), pp. 1-89 : 77-79

Iteaphila stentor (Melander) comb. nov.

( Figs 78 , 80 )

Euthyneura stentor Melander, 1902: 348 . Type locality: Cloudcroft , New Mexico, USA.

Anthepiscopus stentor: Melander, 1928: 108 (male terminalia).

Type material examined. HOLOTYPE ♂, labelled: “Cloudcroft [32°57′17″N 105°44′26″W]/ v.27.[19]02. N.M [H.L. Viereck, leg.]”; “ TYPE No./ -97- [red label]”; “ Euthyneura / stentor/ sp.n.” [dissected] ( ANSP).

Recognition. Males of this species are immediately identified by the symmetrical cup-like apex of the phallus ( Fig. 78 ).

Redescription. Wing length 2.7 mm. Male. Head black in ground-colour, with brown to black setation, occiput finely greyish pollinose. Eyes holoptic; upper ommatidia somewhat enlarged, border between larger and smaller ommatidia indistinct. Frons represented by small triangular space just above antennae, bare, greyish pollinose. Ocellar triangle prominent, with 2 pairs of long bristly hairs. Postvertical and postocular setae moderately long, thin; occiput covered with numerous similar bristly hairs in lower part. Antenna black; scape short, subequal to globular pedicel, both with short setae; postpedicel with broad base, nearly 2.5 times longer than wide; stylus short, with segment 9 tubular, 2X as long as wide, sensillum-tipped, subequal in length to width of segment 9. Proboscis moderately long, shorter than height of head; palpus somewhat shorter than labrum.

Thorax dark in ground-colour, with brown to black setation [scutum and prescutellar depression obscured by pin]; mesopleuron and sternopleuron lacking shining spots, finely greyish pollinose. Proepisternum with a few setulae. Postpronotal lobe with 2 moderately long and several shorter setae. Mesonotal setae prominent; acr short, biserial [prescutellar depression obscured by pin]; dc uniserial, offset from row anteriorly, mostly subequal to acr; several presut spal, 3 npl (with several additional shorter setae), 1 long psut spal, 1 pal and 5 pairs of sctl; some additional setulae present on supra-alar face.

Legs, including coxae, pale. Coxae and trochanters with ordinary hair-like setae. Fore femur with several posteroventral subapical short bristly hairs. All tibiae lacking prominent setae (except subapicals). Mid femur with several posteroventral subapical, short, spine-like setae. Hind femur with rows of moderately long anteroventral (shorter basally), anterodorsal and posterodorsal bristly hairs along whole length. Tarsi of all legs unmodified.

Wings distinctly uniformly brownish infuscate; no seta at wing base; pterostigma distinct brownish, elliptical, overlapping apex of vein R 1; anal lobe very prominent, acute. Sc complete; R 2+3 straight in apical part; radial fork lacking; cell dm broad, longer than basal cells, hardly produced apically, almost truncate; m-m crossvein short, M branches widely separated; dm-cu crossvein straight, nearly as long as CuA. Apex of cell cua slightly round; CuA+CuP long, ending short of wing margin. Halter brown.

Abdomen largely brownish, subshiny, brownish pollinose, covered with moderately long fine setae. Terminalia ( Fig. 78 ) concolorous with abdomen, small. Hypandrium with several long setae, rounded, with rig-like dorsoapical extension; gonocoxal apodeme long and slender; inner apodeme unknown; postgonite elongate, arched, produced into apical lobe emerging around edge of epandrium. Phallic guide extended beyond epandrium, divergent apically from phallus, projecting obliquely with apical section clothed in teeth-like projections; apex strongly tapered. Epandrium not inflated laterally; dorsal bridge broad; produced distally into slender horizontally projecting surstylus; apex of surstylus with hook-like projection, curved medially. Phallus strongly arched beyond epandrium, strongly expanded subapically in cup-like apex; ejaculatory apodeme plate-like, rounded, shorter than gonocoxal apodeme. Cercus very short, subtriangular, one-third length of epandrium; apex broadly rounded, extended free from epandrium; hypoproct produced into pair of short processes, only slightly projecting.

Female. Unknown.

Distribution. Nearctic: USA (New Mexico). This species is only known from the type locality in New Mexico ( Fig. 80 ).

Remarks. Apart from the holotype collected more than 100 years ago, no further specimens of this species are known.

Unplaced to species group

Figures

FIGURES 75–78. Male terminalia of Iteaphila with unbranched R 4+5. 75, I. zontaki (Nowicki), lateral view; 76, same, phallus, dorsal view; 77, I. parastentor sp. nov., lateral view; 78, I. stentor (Melander), lateral view. Scale bar = 0.1 mm. Abbreviations: ph—phallus; sur—surstylus.

FIGURES 79–81. Distribution of Iteaphila with unbranched R 4+5. 79, I. longiphallus sp. nov., I. recurvata sp. nov.; 80, I. falcata Sinclair, I. parastentor sp. nov., I. stentor (Melander); 81, I. atruensis sp. nov., I. gracilis sp. nov., I. kyrgyzstanensis sp. nov., I. sakhalinensis sp. nov., I. spinosa sp. nov.