Pest Fruit Flies of the World

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L.E. Carroll, I.M. White, A. Freidberg, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson

Munromyia nudiseta Bezzi

Body. Body elongate; predominantly orangish to brown.

Head. Number of frontal bristles three pairs. Number of orbital bristles one pair. Anterior orbital bristle of male normal, unmodified. Posterior orbital bristles reclinate; acuminate. Ocellar bristles absent or minute, like setulae. Postocellar bristles absent. With both inner and outer vertical bristles. Outer vertical, postvertical and postocellar bristles all acuminate. Postocular bristles acuminate; reduced in number and size, hardly detectable in 25x. Genal bristle present. Head higher than long. Male and female head width the same. Frontofacial angle about equal to a right angle and angular. Face flat; without transverse sulcus, antennal grooves, or carina; shorter than frons; vertical; with dark spots in antennal furrows. Parafacial spot absent. Frons and parafacial without small silvery markings. Fronto-orbital plate setulose. Frontal stripe setulose. Eye ratio 1.50. Antenna considerably longer than face. Scape, pedicel, and first flagellomere scape and pedicel short, first flagellomere elongate. First flagellomere longer than face; rounded apically. Arista as long as first flagellomere, or shorter than first flagellomere; bare or with hairs distinctly shorter than greatest aristal width. Proboscis short, capitate.

Thorax. Inner scapular bristle absent or indistinguishable from surrounding vestiture. Outer scapular bristle present and distinguishable from surrounding vestiture; dark. Postpronotal bristle absent. Presutural dorsocentral bristle absent. Presutural supra-alar bristle absent. Postsutural supra-alar bristle present. Acrostichal bristle absent. Postsutural dorsocentral bristle absent. Intra-alar bristle present, well developed, similar to postalar bristle. Intrapostalar bristles absent. Number of scutellar bristles two pairs. Apical scutellar bristles as long as basals or longer. Anterior notopleural bristle present. Posterior notopleural bristle(s) acuminate. Number of outstanding anepisternal bristles one. Katepisternal bristles absent. Anepisternal bristles dark, brown to black. Long, erect setulae on laterotergite present (few, short). Scutal setulae acuminate and pale. Scutellum sparsely setulose. Setulae on scutellum short, decumbent; unicolorous, acuminate. Transverse suture with the lateral branches wide apart. Complete sclerotized postcoxal metathoracic bridge absent or semimembranous. Scutum without a large dark central stripe which broadens basally. Postpronotal lobe predominantly of the ground color. Posterior half of notopleuron same as ground color. Scutum dorsad of notopleuron of the ground color, not whitish or yellowish. Dark lyre-like pattern on scutum absent. Discrete shiny black spots on scutum absent. Median longitudinal black stripe on scutum present. Number of pale whitish to yellow postsutural stripes zero. Scutum without blackish dorsocentral stripe. Area bordering scutoscutellar suture medially without dark brown spot, brown. Discrete pale horizontal stripe along upper anepisternum absent or indistinct. Distinct pale vertical anepisternal stripe extending to notopleuron, or extending halfway between posterior half of notopleuron and anterior notopleural bristle. Katepisternite with pale yellowish or whitish spot absent or indistinct. Transverse suture without distinct stripe or spot. Katatergite with pale yellowish or whitish spot absent or indistinct. Anatergite with pale yellowish or whitish spot absent or indistinct. Subscutellum uniformly black. Mediotergite uniformly brown. Scutum microtrichia in discrete pattern due to density differences. Dorsum of scutellum flat or slightly convex, not swollen. Scutellum normal; with a dark and pale pattern; with no isolated dark spots; with a basal triangular black mark that does not extend to apex; marked with an orange-brown triangle.

Legs. Femora swollen. Fore femur with spinelike bristles; with more than 5 strong black ventral spines; with 1 to 3 posterodorsal and 1 posteroventral rows of bristles only. Mid femur and hind femur with anteroventral and posteroventral rows of small, stout, spine-like bristles. Middle leg of male without feathering. Femora at least one femur markedly darker in apical part than in basal part; dark mark on fore femur 40–50–60% of length of femur; dark mark on middle femur 60–70% of length of femur; dark mark on hind femur 60–67–80% of length of femur.

Wings. Wing partly bare. Cell bc microtrichia absent. Cell c microtrichia absent, or present in apical area. Cell dm bare on basal one-third to one-half, or bare on less than basal one-third. Dense microtrichia at end of vein A1+CuA2 in male absent. Dominant wing pattern cross-banded. Crossbanded wing patterns with bands extensively fused, distorted, or greatly reduced. Wing pattern mostly brownish. Dark longitudinal streaks through basal cells absent. Crossvein r-m hyaline, or covered by short, diffuse infuscation, or covered by short, well-defined infuscation. Crossvein dm-cu covered by a major crossband which reaches posterior margin of wing. Crossveins r-m and dm-cu not both covered by a single crossband. Cell r2+3 apical to r-m with large hyaline area. Anal band absent, or not reaching nearly to wing margin. Cell r1 and r2+3 without darker spots within the pattern. Intercalary band absent. Subbasal crossband absent. Subbasal and discal crossbands not joined. Marginal hyaline area in cell r1 present and distinct. Ratio of width of apical band in cell r4+5 to length of r-m 4. Anterior apical crossband contiguous with costa over entire length, without marginal hyaline band or spots apically in cells r1 and r2+3. Anterior apical band or costal band extended to vein M. Posterior apical crossband absent. Costal and discal bands not joined on vein R4+5. Discal band transverse, or oblique in anterobasal-posteroapical direction, or absent. Discal and apical crossbands not directly joined. Discal and subapical crossbands not joined. Discal and subapical bands not connected along vein R4+5. Subapical and anterior apical crossbands joined. Outstanding costal spine(s) at subcostal break absent. Ratio of length of costal section 3 to costal section 4 0.33. Ratio of pterostigmal length to width 4. Vein R1 dorsal setation without bare section opposite end of vein Sc. Vein Rs dorsal setation non-setulose. Vein R2+3 generally straight. Anteriorly-directed accessory vein emerging from R2+3 absent. Vein R4+5 dorsal setation on node only; ventral setation absent or only present on node or close thereafter. Distance between crossvein r-m and costa longer than r-m. R-m crossvein on cell dm at or near middle of cell dm (after middle). Cell bm narrow, triangular; ratio of length to width 5; ratio of width to cell cup width 0.75–0.8. Vein M distally straight. Cell dm widens apically gradually from base. Posterodistal corner of cell dm distinctly acute. Cell cup extension or lobe present, vein CuA2 abruptly bent; shorter than vein A1+CuA2; triangular.

Abdomen. Abdomen ovate or parallel sided. Abdominal tergites separate. Abdomen in lateral view flatter, more flexible. Abdominal tergite 1 broader at apex than at base; without a prominent hump laterally. Pecten of dark bristles on tergite 3 of male absent. Tergal glands on tergite 5 absent. Abdominal tergite 5 normal. 6th tergite of female exposed; shorter than 5th (slightly), or as long as 5th. Abdominal setulae acuminate and dark, or acuminate and pale. Abdominal microtomentum uniform, or absent. Abdominal sternite 5 of male less than 2x wider than long, not longer than wide. Posterior margin of sternite 5 of male with deep V-shaped posterior concavity. Abdominal tergites 3–5 predominantly yellow to orange brown. Abdominal tergites without medial dark stripe; not brown with medial T-shaped yellow mark; without isolated dark areas on lateral margins of T3-T5; with dark brown transverse bands which may be interrupted medially (A2 only).

Male terminalia. Epandrium in posterior view with long outer surstyli, which are more than half as long as epandrium; lateral view with outer surstyli distinctly narrower than epandrium, clearly differentiated. Distiphallus present; without basolateral membranous lobe.

Female terminalia. Syntergosternite 7 straight; shorter than preabdomen; 3 mm; base without a laterally projecting flap; flattened. Ratio of syntergosternite 7 to abdominal tergite 5 3. Dorsobasal scales of eversible membrane about as large as other scales. Three sclerotized spermathecae.

Miscellaneous. Male attractant: none known.

Afrotropical. South Africa.

Trypetinae. Adramini.

Illustrations. • Habitus male (dorsal), wing.


Cite this publication as: ‘L.E. Carroll, I.M. White, A. Freidberg, A.L. Norrbom, M.J. Dallwitz, and F.C. Thompson. 2002 onwards. Pest fruit flies of the world. Version: 8th December 2006. http://delta-intkey.com’.

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