Platypygus Loew

Gharali, Babak, Evenhuis, Neal, Kamali, Karim & Talebi, Ali Asghar, 2011, A review of the genus Platypygus Loew (Mythicomyiidae: Platypyginae) in Iran, with notes on Cyrtisiopsis maculiventris (Loew) n. comb., Zootaxa 2979, pp. 25-40 : 26-27

Genus Platypygus Loew

Platypygus Loew, 1844: 127 . Type species: Platypygus chrysanthemi Loew, 1844 , by monotypy.

Platypygus is distinguished from other genera of Platypyginae by the combination of following characters: postgena not developed as an acute process; mesonotum highly arched; discal cell closed and presence of vein R2+3 at the middle of veins R4+5 and R1 (i.e., its apex is equidistant between the end of both veins).

Key 1 to species of the genera Platypygus and Cyrtisiopsis known from Iran

1. Postgena extending posterior as an acute process ( Fig. 9 a), br cell equal to bm cell ( Fig. 9 d)..................................................................................... Cyrtisiopsis maculiventris ( Loew, 1874) , comb. nov. - Postgena normal, at most with minute blunt process (e.g. Figs. 1 a, b); br cell longer than bm cell ( Figs. 1 j, 3d, 6f)..........

1. Although the species P. lativentris and P. chrysanthemi do not occur in Iran, to show differences between them and the new Iranian species, we included both in the key.

........................................................................................( Platypygus )...2

2. Halteres with a black spot on dorsal surface.............................................. P. lativentris Loew, 1873

- Halteres completely yellow, without any black mark.......................................................... 3

3. Mesonotum completely bare ( Fig. 3 f); antennae completely black; female genitalia with furca without sclerotized plates next to genital orifice ( Fig. 4 a)....................................................... P. kurdorum Paramonov, 1929 2

- Mesonotum hairy; antennal scape yellow or black; female genitalia with furca with two sclerotized plates next to genital orifice................................................................................................. 4

4. Hairs on mesonotum completely black, frons yellow with a black, Y-shaped mark medially.... P. chrysanthemi Loew, 1844

- Hairs on mesonotum completely yellow, frons yellow, at most with a narrow black line medially...................... 5

5. Mesonotum with two black spots next to transverse suture; black median stripe on mesonotum mostly reaching to scutellum ( Fig. 1 c); abdominal tergites with fine and long pale hairs; male genitalia huge and well exposed ( Fig. 1 g); spermathecal reservoirs acorn-shaped, with an obvious cap ( Fig. 2 g)......................... P. titanomedea Gharali & Evenhuis , sp. nov.

- Mesonotum without black spots ( Fig. 6 d); black median stripe on mesonotum ending much before scutellum with straight posterior margin ( Fig. 6 i); scape yellow; abdominal tergites with short, dense and black bristly hairs on disc ( Figs. 6 g, h); male genitalia very small ( Fig. 6 c); spermathecal reservoirs oboval, without cap ( Fig. 7 b)........... P. melinoproctus Loew, 1873

Figures

FIGURE 2. Genitalia of P. titanomedea: a—epandrium (lateral view), b—epandrium (posterior view), c—gonocoxa and gonostyli (dorsal view), d—phallic complex (lateral view), e—phallic complex (dorsal view), f—female genitalia except reservoirs, g—spermathecal reservoir.

FIGURE 4. Genitalia of P. k urd or u m: a—female genitalia except reservoirs, b—spermathecal reservoir, c—gonocoxa and gonostyli (dorsal view), d—phallic complex (lateral view), e—phallic complex (dorsal view), f—epandrium (lateral view).

FIGURE 7. Genitalia of P. melinoproctus: a—female genitalia except reservoirs, b—spermathecal reservoir, c—epandrium (anterodorsal view), d—left half of gonocoxite and gonostylus, e—phallic complex (dorsal view), f—phallic complex (lateral view).

FIGURE 9. Cyrtisiopsis maculiventris: a—head (lateral view), b—head (anterior view), c—mesonotum (dorsal view), dwing.

FIGURE 1. P. titanomedea: a—male, b—female, c—mesonotum (dorsal view), d—male abdomen (dorsal view), e—female abdomen (dorsal view), f—antenna, g—male abdomen (lateral view), h—mesonotum (lateral view), j—wing, k—head (anterodorsal view).

FIGURE 3. P. k u rd o r u m: a—female, b—Holotype, c—male, d—wing, e—antenna, f—mesonotum (lateral view), g—female abdomen (dorsal view), h—mesonotum (dorsal view), j—male abdomen (dorsal view).

FIGURE 6. P. melinoproctus: a— female, b— head, c—male, d— mesonotum (lateral view), e—antenna, f—wing, g—male abdomen (dorsal view), h—female abdomen (dorsal view), i—mesonotum (dorsal view).