Leptomydas tigris, Dikow, Torsten, 2010

Dikow, Torsten, 2010, New species and new records of Mydidae from the Afrotropical and Oriental regions (Insecta, Diptera, Asiloidea), ZooKeys 64, pp. 33-75 : 40-42

Leptomydas tigris sp. n. Figs 7-93246

Etymology:

tigris Latin noun = tiger. Referring to the TIGER project (Thailand Inventory Group for Entomological Research) that collected the sole holotype in its extensive malaise trap sampling throughout Thailand.

Diagnosis:

The species is distinguished from congeners by the yellow and brown abdominal tergites, features of the male terminalia, and its apparent distribution in Thailand.

Description Male:

Head: brown, in general grey pruinose; width distinctly greater than thorax, interocular distance on vertex larger than at ventral eye margin, vertex between compound eyes slightly depressed, parafacial area less than ½ the width of central facial gibbosity; facial gibbosity distinct, well-developed and discernible in lateral view; mystax white, covering only lateral facial gibbosity (asetose medially); frons medially apruinose, laterally grey pruinose, vertex medially apruinose, laterally grey pruinose, postgenae apruinose; setation: vertex white, frons white, ocp setae white, pocl setae white; ocellar triangle apruinose; proboscis brown, long, projecting well-beyond fronto-clypeal suture, reaching ¼ of length of postpedicel; labella large, much wider than prementum, as long as prementum, unsclerotised laterally; maxillary palpi cylindrical, brown, as long as pedicel.

Antenna: brown, scape and pedicel white setose dorsally and ventrally; postpedicel cylindrical in proximal ½, symmetrically bulbous in distal ½, ≥ 7.0 times as long as combined length of scape and pedicel; apical ‚seta-like‘ sensory element situated apically in cavity on postpedicel.

Thorax: brown, scutum predominantly grey pruinose, pleura predominantly apruinose; scutum medially bluish-black, laterally brown, surface entirely smooth, predominantly pruinose with a presutural apruinose stripe antero-laterally, median stripe and sublateral stripes sparsely grey pruinose, remaining parts densely grey pruinose, scutal setation comprised of distinct rows of long dorsocentral setae and lateral scutal setae; dc setae pre- and postsuturally white, acr setae absent, lateral scutal setae white, npl, spal, and pal setae absent; postpronotal lobe brown, grey pruinose; proepisternum, lateral postpronotum, and postpronotal lobes long white setose; scutellum grey pruinose proximally, apruinose distally, asetose, apical scutellar setae absent; mesopostnotum, anatergite, and katatergite grey pruinose, mesopostnotum asetose, anatergite asetose, katatergite long white setose; katatergite ± flat; anterior anepisternum asetose, supero-posterior anepisternum asetose; posterior anepimeron long white setose, katepimeron asetose; metepimeron ± flat, same colour as T1, grey pruinose, long white setose; metepisternum grey pruinose, asetose.

Leg: brown and yellow, setation black and white; all coxae grey pruinose, white setose; met trochanter setose medially; femora anteriorly brown, posteriorly yellow, met femur proximally yellow, met femora ± cylindrical only slightly wider than pro and mes femora, in distal ½ macrosetose, only a single antero-ventral macroseta distally; all tibiae laterally arched, met tibia cylindrical, ventral keel absent; pro and mes tarsomere 1 about as long as individual tarsomeres 2, 3, or 4, met tarsomere 1 as long as combined length of tarsomeres 2-3; pulvilli well-developed, as long as well-developed claws, and as wide as base of claws; empodium absent.

Wing: length = 11.9 mm; slightly brown stained throughout, veins brown, microtrichia absent; cells r1, r4, r5, m3, + cup closed except r5 open; C terminates at junction with M1 (or M 1+ M 2); R4 terminates in R1; R5 terminates in R1; stump vein ( R 3) at base of R4 present, short not reaching R2; R4 and R5 widest apart medially; r-m distinct, R4+5 and M1 apart, connected by crossvein; M1 curves anteriorly at r-m, M1 (or M 1+ M 2) terminates in C; CuA1 and CuA2 split proximally to m-cu (cell m3 narrow proximally); M3+CuA1 do not terminate together in C; A1 undulating, cell a1 wide, A1 and wing margin further apart proximally than distally, alula well-developed; halter brown or light brown.

Abdomen: brown and yellow; setation comprised of scattered white and black setae, surface entirely smooth; T1 and T5-7 brown, narrow yellow posterior margins, T2-4 yellow, brown medially and laterally; T1-2 long white setose, T3 short white and black setose; T predominantly apruinose; S1 light brown, S2-5 yellow, brown anteriorly, S6-7 brown with yellow posterior margins; S1 asetose, S2 long white setose, S3 short white setose; S predominantly apruinose; T2-4 parallel-sided and not constricted waist-like; bullae on T2 brown, oval, surface entirely smooth, T2 surface anterior to bullae smooth.

Male terminalia: T1-7 well-developed, entirely sclerotised, T8 postero-medially weakly sclerotised, with anterior transverse sclerotised bridge connecting lateral sclerites; T7-8 anteriorly with 2 lateral apodemes; S6 regular, without any special setation postero-medially, S8 well-developed and simple, fused to T8 dorso-laterally, entire (undivided) ventro-medially; epandrium formed by single sclerite (fused medially ± entirely), pointed postero-medially; subepandrial sclerite without lateral or median protuberances; hypandrium slightly concave, partially divided ventro-medially, anteriorly with heavily sclerotised transverse bridge, entirely fused with gonocoxite, form ing a gonocoxite-hypandrial complex; gonocoxites laterally compressed, slightly angled medially distally, with median protuberance, gonocoxal apodeme present, short (at most slightly extending hypopygium anteriorly); 1 functional aedeagal prong; aedeagal epimere absent; lateral ejaculatory processes absent; ejaculatory apodeme formed by single dorso-ventrally oriented plate; ventro-median margin of dorsal aedeagal sheath heavily sclerotised (appearing entirely closed); dorsal aedeagal sheath short, sperm sac entirely free; sperm sac appearing ± heavily sclerotised.

Description Female:

Unknown.

Material examined:

Thailand: Loei: 1 ♂ Phu Kradueng National Park, Forest protection unit Loei.5 (Phakbung) , 16°50'32"N; 101°41'40"E, T 1499, 13-19.ii.2007, malaise trap, Wuthicahi kwanjam ( AAM-001138 1 ♂ holotype, LACM) .

Type locality and distribution:

Phu Kradueng National Park (16°50'32" N; 101°41'40" E), Thailand (Fig. 46). Biodiversity hotspot/high-biodiversity wilderness area: Indo-Burma/-.