Iteaphila parastentor Sinclair & Shamshev 2021, sp. nov.
Creators: name: Sinclair, Bradley J.
name: Shamshev, Igor V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Iteaphilidae
Iteaphila
Iteaphila parastentor

description: Iteaphila parastentor sp. nov.
(Figs 9, 77, 80)
urn:lsid:zoobank.org:act: C3D30952-BA5D-4364-B3E1-8577324A3EA5
Type material. HOLOTYPE ♂, labelled: “KokaneeMtn [49°50′N 117°00′W]/ 11Aug [19]03 BC/ Altitude 8000 ft / RPCurrie/ Collector”; “ALMelander/ Collection/ 1961”; “ HOLOTYPE / Iteaphila / parastentor/ Sinclair & Shamshev [red label]” (USNM). PARATYPES: CANADA. British Columbia: same data as holotype (1 ♂, 1 ♀, USNM); 37 km W Anahim Lake [52°32′03″N 125°47′14″W], 6.vii.1992, A. Borkent (1 ♂, CNC).
Recognition. This species is immediately distinguished from all other species of Iteaphila by the funnel-shaped apex of the phallus (Fig. 77).
Description. Wing length 2.2–2.4 mm. Male (Fig. 9). Head dark brown in ground-colour, with black setation, occiput thinly to densely greyish pollinose. Eyes holoptic, with upper ommatidia enlarged. Frons represented by small triangular space just above antennae, bare, greyish pollinose. Ocellar triangle prominent, with 2 pairs of long hair-like setae. Postvertical setae subequal to postocular setae, thin; occiput covered with numerous similar setae in lower part. Antenna dark brown; scape shorter than globular pedicel, both with short setae; postpedicel rather broad, nearly 2.5 times longer than basal width, base expanded and smoothly tapered; stylus ca 2–3 times longer than wide, sensillum-tipped; segment 9 tubular, 2 times longer than wide, apical sensillum about half as long as segment 9. Proboscis medium-length, projected obliquely; labium subequal to head height; palpus projected parallel to labrum, apex expanded, somewhat shorter than labrum.
Thorax dark brown in ground-colour with posterior part of postpronotal lobe and postalar tubercle weakly paler, with brown to black setation; scutum viewed dorsally entirely velvety brown, slightly matt, without vittae; viewed anteriorly densely brown pruinose, with 2 indistinct pale pruinescent vittae; mesopleuron uniformly greyish brown pollinose. Proepisternum with a few hair-like setae. Postpronotal lobe with 1 long thin and several shorter setae. Mesonotal setae distinct, thin; acr short, biserial, lacking on prescutellar depression, distance between rows shorter than length of acr; dc uniserial (with some additional setulae in anterior part), offset from row anteriorly, slightly longer than acr, 2–3 distinct prescutellar dc; 1 ph, 1 presut spal (sometimes with additional setulae), 4 npl (with a few additional shorter setae), several psut spal setulae, 1 pal and several short setulae, 5–6 pairs of sctl.
Legs, including coxae, almost entirely brownish; knees of fore and mid legs slightly paler, tarsi somewhat darker. Coxae and trochanters with unmodified hair-like setae. Fore femur with row of short anteroventral hair-like setae and somewhat longer setae on posteroventral, dorsal and posterior faces. Mid femur with moderately long posteroventral bristly setae along entire length, bearing some moderately long setae on dorsal and posterior faces. Hind femur with long anteroventral and dorsal setae along whole length. Tibiae with prominent posterodorsal setae. Tarsomere 1 of mid and hindlegs with pair of rows of stiff ventral setae; tarsomere 5 not flattened on all legs; pulvilli broad, shorter than tarsal claw.
Wing distinctly uniformly brownish infuscate; basal costal seta absent; pterostigma distinct brownish, elliptical, overlapping apex of R 1; anal lobe very prominent, acute. Sc complete; R 2+3 often slightly bowed posterior to pterostigma; R 4+5 unbranched; cell dm broad, longer than basal cells, truncate apically; base of M 2 (crossvein) less than one-fourth length of dm-m, M branches widely separated; dm-m crossvein slightly concave. Apex of cell cua recurved, CuA+CuP long, ending short of wing margin, very faint. Halter brown.
Abdomen brown, subshiny, finely brownish grey pollinose, covered with long brownish setae. Terminalia (Fig. 77) concolorous with abdomen, small. Hypandrium with numerous short setae, rounded, not upcurved, dorsoapical margin with row of teeth-like projections; enclosing phallic guide apically in sheath; gonocoxal apodeme short and slender; inner apodeme expanded and flattened, shorter than gonocoxal apodeme; postgonite very long, arched posteriorly well beyond epandrium, expanded laterally at apex, acting as phallic brace. Epandrium not inflated laterally; dorsal bridge very narrow; produced distally into slender horizontally projecting surstylus; apex of surstylus with hook-like projection arching outwards. Phallus slender basally, arched beyond epandrium, greatly expanded apically, funnel-shaped, heavily sclerotized and membranous cap; ejaculatory apodeme plate-like, rounded, slightly longer than gonocoxal apodeme. Cercus long, digitiform, two-thirds length of epandrium; apex narrow and rounded, extended free from epandrium; hypoproct produced into pair of short, slender processes, projecting beyond epandrium.
Female. Similar to male, except as follows:Eyes dichoptic; ommatidia equally small.Frons very broad, somewhat widened toward ocellar tubercle, subshiny, finely brownish grey pollinose, with marginal setulae. Scutellum usually with 5 pairs of setae. Legs, including coxae, dark with reduced chaetotaxy. Abdomen subshiny, concolourous with thorax, with shorter, less prominent setae. Cercus brownish, long, slender, covered with dark setae.
Distribution. Nearctic: Canada (British Columbia). This species is currently known from two localities in southern British Columbia (Fig. 80).
Etymology. This species is named after its very close similarity with I. stentor.
Remarks. This species and I. stentor have a greatly expanded or funnel-like apex of the phallus.
description: Published as part of Sinclair, Bradley J. & Shamshev, Igor V., 2021, World revision of Iteaphila with unbranched radial vein (Diptera: Empidoidea: Iteaphilidae), pp. 1-89 in Zootaxa 4968 (1) on pages 76-77, DOI: 10.11646/zootaxa.4968.1.1, http://zenodo.org/record/4745566