Microdon Reemer & Bot, 2015, sp. n.
Creators: name: Reemer, Menno
name: Bot, Sander
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Microdon

description: Key to Madagascan species of Microdon
Only males are known of Microdon berobaka Reemer sp. n., M. janne Bot sp. n. and M. tsara Keiser, so whether this key also works for females of those species is unknown.
1 Occiput evenly narrow over entire length: dorsal eye margin parallel to hind margin of head (Figs 52, 59). Male hind basitar- somere dorsally with wide and deep longitudinal groove (Fig. 5). Male genitalia: phallus furcate far from apex, very slender (Figs 53, 61)....................................................................... Microdon (Megodon) 2
- Occiput dorsally widened (even if only slightly): dorsal eye margin diverging from hind margin of head (Figs 21, 47). Male hind basitarsomere dorsally without longitudinal groove (Fig. 6). Male genitalia: phallus furcate closer to apex, moderately slender (Figs 10, 15, 23, 29, 35, 40, 48)......................................................... Microdon s.l. 3
2 Larger species:> 10 mm. Scutellar calcars very large and conical, making angle of about 30° with mesoscutum in lateral view (Figs 57, 60)....................................................................... M. stuckenbergi (Keiser)
- Smaller species: <10 mm. Scutellar calcars more slender and more or less at same level as rest of scutellum (Figs 54, 55)....................................................................................... M. planitarsus Keiser
3 Most of body with bronze sheen (Figs 30, 45). Scutellar calcars of 1/3 of scutellar length or longer..................... 4
- Body largely without bronze sheen, at most mesonotum and tergites 3–4 faintly metallic (Figs 16, 18, 32, 36, 41, 44,). Scutel- lar calcars less than 1/3 of scutellar length.................................................................. 5
4 Tibiae orange (Fig. 45). Alula bare on basomedian 1/2............................................ M. tsara Keiser
- Tibiae black, except apices somewhat paler (Fig. 27). Alula entirely microtrichose................ M. irwini Reemer sp. n.
5 Ventrolateral part of face black, contrasting with pale rest of face (Figs 13, 17)............... M. harinhalai Reemer sp. n.
- Face more or less unicolorous, without contrasting parts (Figs 9, 20, 25, 34, 38).................................... 6
6 Pleuron and tergites black (Figs 32, 33)..................................................... M. janne Bot sp. n.
- Pleuron at least partly pale brown, tergites partly brownish (Figs 7, 8, 18, 19, 24, 36, 37, 41, 42)....................... 7
7 Tergite 3 with complete fascia of pale golden pile along posterior margin (Fig. 7).............. M. berobaka Reemer sp. n.
- Tergite 3 at most with medially widely interrupted, narrow fascia of pale pile posterolaterally......................... 8
8 Smaller species (11 mm) with more compact abdomen (Fig. 18). Lateral margins of tergites 3 and 4 with long white pile (Fig. 22). Male genitalia as in Fig. 20 .................................................... M. ifanadiana Reemer sp. n.
- Larger species (13–14 mm) with more elongate abdomen (Fig. 36). Lateral margins of tergites 3 and 4 with short yellowish pile (Fig. 39). Male genitalia as in Fig. 40 ................................................. M. sava Reemer sp. n.
1 2 4
description: Published as part of Reemer, Menno & Bot, Sander, 2015, Six new species of Microdon Meigen from Madagascar (Diptera: Syrphidae), pp. 127-147 in Zootaxa 4034 (1) on pages 128-129, DOI: 10.11646/zootaxa.4034.1.6, http://zenodo.org/record/243180