Microdon janne Bot

Reemer, Menno & Bot, Sander, 2015, Six new species of Microdon Meigen from Madagascar (Diptera: Syrphidae), Zootaxa 4034 (1), pp. 127-147 : 138-139

Microdon janne Bot sp. n.

( Figs 31–35 )

Diagnosis. A moderately elongate species with dark face, blackish pleuron and blackish abdomen.

Type material. HOLOTYPE. Adult male. MADAGASCAR. Label 1: “ MADAGASCAR / Ranomafana NP / lat-21.235 lng 47.400 / 27 XI 2014 leg. S.Bot". Coll. RMNH.

Description of male holotype. Body size: 10 mm. Head. Face and gena dark reddish brown, almost black near the antennal fossa; entirely white pilose; with narrow band of whitish pollinosity along eye margins. Oral margin slightly produced. Frons and vertex dark reddish brown, turning black around antennal fossa, ocelli and occiput; yellowish white pilose, except anterior part of frons and ocellar triangle black pilose. Occiput black; white pilose and pollinose. Eye almost bare, very sparse and short pile only visible under high magnification. Antennal fossa about as wide as high. Antenna black. Arista black, about 4/5 of length of basoflagellomere. Thorax. Mesoscutum black, lateral margins dark reddish brown; with faint blue-green metallic hues three indistinct longitudinal purplish vittae; yellow-white pilose, except for central submedian pair of patches of black pile. Postpronotum and postalar callus dark reddish brown to black; yellow-white pilose. Scutellum semicircular with pair of apical calcars with mutual distance about 1/4 of width of scutellum at base, slightly concave between calcars; apices of calcars slightly diverging; blackish brown with faint metallic hues; yellow-white pilose. Pleuron blackish except anepisternum and katepisternum dorsally dark reddish brown; all pilosity white. Propleuron bare. Anepisternum with deep sulcus separating anterior from posterior part; pilose anteriorly and posteriorly, with widely bare part in between. Anepimeron entirely pilose. Katepisternum pilose dorsally; bare ventrally. Katepimeron bare and shining. Katatergum and anatergum microtrichose. Calypter white and halter yellow. Wing. Yellowish in cells bc, c, sc and r1, vein R1 yellow; infuscated greyish brown around veins at apical half. Microtrichose, except bare on cell bc, on cell br (only microtrichose along vena spuria and in apical part), posterobasal 1/2 of cell bm, anterobasal 1/3 of cell cup, along A 2 in anal lobe and centre of alula. Legs. Femora black except narrowly dark red at apex; white pilose. Tibiae dark red with faint black ring 1/3 from apex, most conspicuous on hind leg; white pilose. Tarsi dark red to orange; white pilose. Coxae black; white pilose. Trochanters black wit narrow dark red apex; white pilose. Abdomen. Tergite 1 black; white pilose. Tergite 2 black, except lateral margins narrowly reddish brown; white pilose. Tergite 3 black; short black pilose, except longer white pilose along lateral and posterior margins. Tergite 4 black; short black pilose on anterior half, with longer appressed golden pile on posterior half, lateral margins long white pilose. Sternites black, except narrowly yellowish along posterior margins; white pilose (incl. sternite 1). Male genitalia as in Fig. 35 .

Female. Unknown.

Etymology. The species is named after Sander Bot’s girlfriend, Janne Ouwehand, since for long Sander promised her to name after her the first new species for science he would describe. The epithet is a noun in apposition.

Figures

FIGURES 30 – 31. Microdon irwini Reemer sp. n. Female paratype. 30. Abdomen dorsal. 31. Head frontal.

FIGURES 32 – 35. Microdon janne Bot sp. n. Male holotype. 32. Habitus dorsal. 33. Habitus lateral. 34. Head frontal. 35. Genitalia lateral.