Iteaphila lolo, 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 : 48-49

Iteaphila lolo sp. nov.

( Figs 47 , 50 )

urn:lsid:zoobank.org:act:4DF4EC11-EEA7-4ADA-A3FF-B96E5049D225

Type material. HOLOTYPE ♂, labelled: “ USA: MT: Missoula Co. / Lolo NF; Gold Ck Rd ; 1680m / 47°03.338′N 113°44.776′W / 27.vi.2017, B.J. Sinclair / ex. roadside flowers”; “ HOLOTYPE / Iteaphila / lolo/ Sinclair & Shamshev [red label]” ( CNC).

Recognition. This species is distinguished by the elongate stylus (nearly half length of postpedicel), pale setae of the scutum and scutellum and biserial acrostichals; otherwise very similar to I. subnupta sp. nov., but hypandrium is longer and tapered apically ( Fig. 47 ).

Description. Wing length 3.2 mm. Male. Head dark brown in ground-colour, with pale brown 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 hairlike setae. Postvertical setae subequal in length with postocular setae, thin; occiput covered with numerous similar setae in lower part; very pale setae posterior to mouth. Antenna brown; scape subequal to globular pedicel, both with short setulae; postpedicel rather narrow, nearly 4 times longer than basal width, smoothly tapered; stylus nearly half length of postpedicel, sensillum-tipped; segment 9 tubular, 3 times longer than wide, apical sensillum one-third as long as segment 9. Proboscis very long, projected obliquely; labium more than 1.5 times longer than head height; palpus slender, elongate, projected parallel to labrum, distinctly shorter than labrum.

Thorax dark brown in ground-colour with posterior part of postpronotal lobe and postalar tubercle paler, with yellow setation; scutum viewed dorsally entirely greyish pruinescent, without distinct vittae; viewed anteriorly densely pruinose, without vittae; mesopleuron uniformly greyish brown pollinose. Proepisternum with a few hairlike setae. Postpronotal lobe with 1 long thin and several shorter setae. Mesonotal setae distinct; acr moderately long, biserial, lacking on prescutellar depression, distance between rows slightly narrower than length of acr; dc uniserial (with some additional setulae in anterior part), offset from row anteriorly, slightly longer than acr, 2 distinct prescutellar dc; 1 ph, 1 presut spal; 3 npl (with a few additional shorter setae), several psut spal setulae, 1 pal and several short setulae, 5 pairs of sctl.

Legs, including coxae, almost entirely yellowish brown; tarsi somewhat darker; chaetotaxy pale. 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 slightly 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 slightly uniformly infuscate; basal costal seta absent; pterostigma distinct brownish, elliptical, overlapping apex of R 1; anal lobe very prominent, acute. Sc complete; R 2+3 slightly bowed posterior to pterostigma; R 4+5 unbranched; cell dm broad, longer than basal cells, truncate apically; base of M 2 (crossvein) nearly one-third length of dm-m, M branches widely separated; dm-m crossvein slightly concave. Apex of cell cua recurved, CuA+CuP long, pale, ending short of wing margin. Halter brownish.

Abdomen pale brown, subshiny, finely brownish grey pollinose, covered with long pale setae. Terminalia ( Fig. 47 ) concolorous with abdomen, small. Hypandrium with several long setae, rounded, upcurved apically with narrow, tapered, flattened apex; gonocoxal apodeme short and broad; inner apodeme small and flattened, half length of gonocoxal apodeme; postgonite short, arched, paired appressed tapered lobes. Phallic guide extended slightly beyond epandrium, parallel with phallus and bent nearly at right angles subapically; bent apical section paired with jagged or toothed surface apically; apex tapered. Epandrium not inflated laterally; dorsal bridge moderately narrow; produced distally into broad horizontally projecting surstylus; apex of surstylus with hooked projection medially. Phallus slender, arched slightly beyond epandrium, bent nearly at right angles subapically; apical section broad, truncate; ejaculatory apodeme plate-like, rounded, slightly shorter than gonocoxal apodeme. Cercus short, triangular, one-quarter length of epandrium; apex rounded, extended free from epandrium; hypoproct produced into pair of very short processes, not projecting beyond epandrium.

Female. Unknown.

Distribution. Nearctic: USA (Montana). This species is known only from the type locality in Montana ( Fig. 50 ).

Etymology. This species is named after the type locality, the Lolo National Forest in Montana, USA and is a noun in apposition.

Remarks. This species is somewhat similar to I. subnupta sp. nov., and is distinguished by the yellowish thoracic setae and biserial acrostichals.

Figures

FIGURES 45–48. Male terminalia of Iteaphila with unbranched R, lateral view. 45, I. gracilis sp. nov.; 46, I. grandis sp. 4+5 nov.; 47, I. lolo sp. nov.; 48, I. longipalpis (Melander). Scale bar = 0.1 mm. Abbreviations: cerc—cercus; epand brg—epandrial bridge; hyprct proc—hypoproct process; ph—phallus; ph gd—phallic guide; sur—surstylus.

FIGURES 49–52. Distribution of Iteaphila with unbranched R. 49, I. arnaudi sp. nov., I. bayarea sp. nov., I. grandis sp. 4+5 nov., I. sierrensis sp. nov.; 50, I. brooksi sp. nov., I. lolo sp. nov.; 51, I. flavipilosa (Coquillett); 52, I. glabricula sp. nov.