Iteaphila recta, 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 : 18-21

Iteaphila recta sp. nov.

( Figs 23 , 26 )

urn:lsid:zoobank.org:act:2E3BBA8D-4C53-4C3C-9F02-C379E800FF22

Type material. HOLOTYPE ♂, labelled: “CAN: AB: Peter Lougheed/ PP, Ptarmigan Cirque Tr./ 10.vii.2012, 2208– 2366 m / N50°35.046′;W114°59.35′/ B.J. Sinclair ”; “ HOLOTYPE / Iteaphila / recta/ Sinclair & Shamshev [red label]” ( CNC) . PARATYPES: CANADA. Alberta: Banff [51.5°N 116.0°W], 12.vii.1922, C.B.D. Garrett (1 ♀, CNC); Banff, Sulphur Mt. [51°08′41″N 115°34′30″W], 5000–7000 ft, 24.vii.1925 , ex. choke cherry, O. Bryant (11 ♀, CAS); Banff NP [51.5°N 116.0°W], 14 mi W Banff , Ledum groenlandicum , 7 and 15.vii.1955 , GES (4 ♀, CNC); Banff NP, Sunwapt Pass [52°12′50″N 117°09′34″W], 6700 ft, 9.vii.1955 , GES (1 ♀, CNC); Banff NP, Bow Pass [51°42′58″N 116°30′11″W], 17.vii.1955 , R. Coyles (1 ♂, 4 ♀, CNC); same data as holotype (23 ♂, 2 ♀, CNC); same data except , CNC197580 , CNC197581 (1 ♂, 1 ♀, barcoded, CNC); 8 kmW Lake Louise , 31.v.1992 , AB (30 ♂, 5 ♀, CNC); same data except , CNC161432 (1 ♂, barcoded, CNC); Lake Louise, Plain of Six Glaciers [51°23′51″N 116°15′46″W], 2.vii.1993 , PHA & M.M. Arnaud (4 ♂, USNM); Peter Lougheed PPk, Sarrail Ck , 9.vii.2012 , ex. flowers, 50°36′25.7″N 115°7′48.61″W, BJS (9 ♀, CNC); same data except , CNC197576 (1 ♀, barcoded, CNC). British Columbia: Glacier NP, Rogers Pass [51°16′35″N 117°30′25″W], 30.vi.1968 , W.W. Wirth (1 ♂, USNM); Lisadele Lk. , 58°41′N 133°04′W, 4000 ft, 9–11.vii.1960 , R. Pilfrey (2 ♂, 10 ♀, CNC); same data except, 7– 9.vii.1960 , WWM (1 ♂, 7 ♀, CNC); Mt. Revelstoke NP, Miller-Eva Lakes [51°04′52″N 118°06′35″W], 6300 ft, 13.vii.1952 , GJS (10 ♂, CNC); Eva Lk. trail, 6000 ft, 13.vii.1952 , G.P. Holland (5 ♂, CNC); same data except, 9.vii.1952 , GJS (2 ♂, 1 ♀, CNC); Mt. Revelstoke , 2–25.vii.1952 , GJS (2 ♂, 15 ♀, CNC); 11 km SW Salmon Arm [50°42′8″N 119°16′20″W], 28.v.1992 , AB, CNC161433 (1 ♂, barcoded, CNC); Manning Pk [49°4′N 120°47′W], 1900 m, 27.vi.1984 , R. Danielsson (1 ♂, 2 ♀, MZLU); Manning Pk , 29.vi.1973 , H.J. Teskey (1 ♂, CNC); Summit Lk, mi 392 Alaska Hwy [58°39′6″N 124°39′4″W], 18–27.vi.1959 , REL (8 ♀, CNC); same data except, 19.vi., 26–27.vi.1959 , E.E. MacDougall (3 ♀, CNC). Yukon: Rampart House [67°25′26″N 140°59′00″W], 2.vi.1951 , J.E.H. Martin (2 ♂, 1 ♀, CNC). USA. Alaska: Juneau [58.32°N 134.41°W], 1.v.2006 , bog, Coptis aspleniifolia, M. Willson (2 ♀, FSL). Colorado: Boulder Co., Corona Pass [39°56′03″N 105°40′58″W], 6.vii.1961 , JGC (1 ♂, 2 ♀, CNC); Grand Co., Fraser [39°56′39″N 105°48′48″W], 9500 ft, 7.vii.1961 , JGC (1 ♂, CNC); Mt. Evans, Timberline [39°38′47″N 105°35′26″W], 11600 ft, 11.vii.1961 , CHM (1 ♀, CNC); Niwot Ridge [40°03′51″N 105°35′21″W] nr Ward , 11500 ft, 28.vi., 4.vii.1961 , CHM (7 ♂, 5 ♀, CNC). Montana: Gallatin Co., Gallatin Range, Windy Pass [45°15′55″N 111°6′5″W], 14.vii.1968 , M.A. Deyrup (1 ♂, 1 ♀, CUIC). Utah: Garfield Co., 15 km N Boulder [40°61′39″N 105°16′39″W], 20.vi.1994 , JFM (1 ♂, 1 ♀, CNC). Wyoming: Centennial [41°17′53″N 106°8′15″W], 2.vii.1936 , I.H. Blake (1 ♂, AMNH); Yellowstone NP, 5 mi W Canyon [44°44′7″N 110°29′17″W], 28.vi.1984 , JFM (5 ♂, 5 ♀, CNC) .

Recognition. This species is distinguished from similar species (with the distinctly expanded base of the postpedicel) by an elongate phallus that extends well beyond the epandrium between the cerci ( Fig. 23 ).

Description. Wing length 3.3–4.2 mm. Male. Head dark brown in ground-colour, with brown to 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 hairlike setae, anterior pair longer than posterior pair. Postvertical setae subequal with postocular setae, thin; occiput covered with numerous similar setae in lower part. Antenna dark brown; scape short, slightly shorter than globular pedicel, both with short setae; postpedicel rather narrow, parallel-sided, nearly 3 times longer than basal width, base distinctly expanded; stylus ca 2.5 times longer than wide, sensillum-tipped; segment 9 tubular, 2 times longer than wide, apical sensillum about two-thirds length of segment 9. Proboscis medium-length, projected obliquely; labium distinctly shorter than head height; palpus projected parallel to labrum, robust with expanded apex, shorter than labrum.

Thorax dark brown in ground-colour with posterior part of postpronotal lobe and postalar tubercle paler, with brown to black setation; scutum viewed dorsally subshiny, with 2 indistinct pale pruinescent vittae between acrostichal and dorsocentral setae; viewed anteriorly densely brown pruinose, with 2 indistinct paler 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 long, 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 (with additional setulae), 4–5 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 brownish yellow, 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 without prominent setae. Tarsomere 1 of all legs 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) one-third or less 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 as faint line. Halter brown.

Abdomen brown, subshiny, finely brownish grey pollinose, covered with long brownish setae. Terminalia ( Fig. 23 ) slightly darker than abdomen, small. Hypandrium with several long setae, rounded, upcurved strongly at midlength, narrow and tapered, with narrow, bifid apex, bearing row of teeth-like projections along posterior margin; gonocoxal apodeme long and broad; inner apodeme expanded and flattened, shorter than ejaculatory apodeme; postgonite very short, subtriangular. Phallic guide not extended beyond epandrium, parallel and shorter than phallus, without bent apical section. Epandrium not inflated laterally; dorsal bridge broad, one third length of epandrium; produced distally into short, slender dorsally projecting surstylus; apex of surstylus with pointed projection medially. Phallus slender, arched well beyond epandrium, directed between cerci, without subapical bend; apex slightly expanded posteriorly; ejaculatory apodeme plate-like, rounded, slightly shorter than length of gonocoxal apodeme. Cercus short, digitiform, one-third length of epandrium; apex rounded, extended free from epandrium; hypoproct produced into pair of very short processes, slightly 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 5–6 pairs of setae. Legs, including coxae, somewhat paler than male with reduced chaetotaxy. Abdomen somewhat paler with shorter, less prominent setae. Cercus brownish, long, slender, covered with dark setae.

Distribution. Nearctic: Canada (Alberta, British Columbia, Yukon), USA (Alaska, Colorado, Montana, Utah, Wyoming). This species is recorded from Alaska to Colorado, primarily along the Rocky Mountains ( Fig. 26 ).

Etymology. The specific name is from the Latin rectus (straight, upright), in reference to the upright, straight phallus that extends beyond the epandrium between the cerci.

Remarks. Flowers of Fern-leaf goldthread ( Coptis aspleniifolia Salisb. , Ranunculaceae ) were mostly visited by Iteaphila sp. and I. recta ( Willson & Anderson 2007; Sinclair & Shamshev 2012) ( Table 4 ).

Figures

FIGURES 21–25. Male terminalia of Iteaphila with unbranched R 4+5. 21, I. beringiensis sp. nov., lateral view; 22, I. bifida sp. nov., lateral view, with arrow indicating apex of phallus in posterior view; 23, I. recta sp. nov., lateral view; 24, I. tribulosa sp. nov., lateral view; 25, same, apex of hypandrium, posterior view. Scale bar = 0.1 mm. Abbreviations: cerc—cercus; epand— epandrium; epand brg—epandrial bridge; hypd—hypandrium; ph—phallus; sur—surstylus.

FIGURES 26–28. Distribution of Iteaphila with unbranched R 4+5. 26, I. bifida sp. nov., I. recta sp. nov., I. tribulosa sp. nov.; 27, I. beringiensis sp. nov., Nearctic; 28, I. beringiensis sp. nov., Palaearctic.