Parascatopse, Cook, 1955

Xiao, Yishen, Li, Zhu & Yang, Ding, 2024, Two new species of Parascatopse Cook, 1955 (Diptera: Scatopsidae) from China, with a key to species in the Palearctic and Oriental Regions, Zootaxa 5538 (1), pp. 89-94 : 90

Key to species (males) of Parascatopse from the Palearctic and Oriental Regions

1 Male sternite 7 truncate apically in posterior projection (Figs. 3, 8)............................................. 2

- Male sternite 7 rounded posteriorly or with broadly triangular posterior projection ( Cook 1955, Figs. 4D,4F)............ 4

2 Male tergite 7 with an obvious concaved median posterior margin (Figs. 4, 9)..................................... 3

- Male tergite 7 only with a shallowly concaved median posterior margin ( Haenni and Pollini 2015, Fig. 2 )............................................................................................ P. distorta Haenni and Pollini

3 Male tergite 7 strongly concaved, with two sharp angles symmetrically on its posterior margin (Fig. 9)... P. concava sp. nov.

- Male tergite 7 obviously concaved, without two sharp angles symmetrically (Fig. 4).................. P. rotunda sp. nov.

4 Penis with tip entire ( Cook 1969, Fig. 24)............................................... P. minutissima (Verrall)

- Penis with bifurcate apex ( Cook 1969, Fig. 26).............................................. P. litorea (Edwards)

Figures

FIGURE 1–2. Parascatopse rotunda sp. nov. (male). 1. Parascatopse rotunda sp. nov.; 2. Wing. Scale bar = 1.0 mm. FIGURE 3–4. 3. Male sternite 7; 4. Male tergite 7. Scale bar = 0.1 mm. FIGURE 5. Male terminalia, ventral view. Scale bar = 0.05 mm.