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

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scientific name

Leptomydas tigris

sp. n.

Leptomydas tigris View in CoL   ZBK sp. n. Figs 7-93246


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.


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:


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) GoogleMaps .

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/-.


USA, California, Los Angeles, Los Angeles County Museum of Natural History