Pseudostegana zonaria (Okada, 1982)

Gong, Lu & Chen, Hongwei, 2018, Seven new species of the genus Pseudostegana (Diptera: Drosophilidae) from South-west China, with DNA barcoding information, Journal of Natural History 52 (31 - 32), pp. 2097-2119 : 2109-2111

The zonaria species group

Pseudostegana zonaria species group: Chen et al. 2005: 437.

Diagnosis

Wing: Medial band as broad as length of dm-cu crossvein at least; r-m crossvein clear; M vein gently curved to R4+5 vein after dm-cu crossvein ( Figures 4 (c,i,o) and 5(c,i)).

Key to species of the zonaria group from China

1. Palpus expanded, medially wider than one-third of length................................................ 2 Palpus slender, rod-like, medially narrower than one-third of length............................ 8

2. Paramere apically bifurcated............................................................................................................. 3 Paramere apically not bifurcated. ................................................................................................... 6

3. Body yellow ( Figure 4 (n,q,r)); paramere protruding bearing three acute projections on distal one-third ( Figure 10 (b,c)).............................. .............................. linyongi sp. nov. Body colour brown to black at least on pleura and abdominal tergites; paramere distally not protruding......................................................................................................................... 4

4. Scutum brown, with one narrow, dark medial stripe on anterior two-thirds, dark brown on posterior one-third ( Figure 5 (b,e)).................................. montipagana sp. nov. Scutum yellow to brownish yellow on anterior two-thirds, lacking distinct medial stripe, brownish yellow to brown on posterior one-third ( Figure 5 (h,k) ....................... 5

5. Ocellar triangle brownish, narrowed below ( Figure 5 (j)); aedeagus apically acute in lateral view ( Figure 12 (c)).......................................... .......................................... sigangli sp. nov. Ocellar triangle brown to dark, not narrowed below ( Li et al. 2010, fig. 1I); aedeagus apically round in lateral view ( Li et al. 2010, fig. 7E).................................... ............................................................................................. insularis Li, Gao and Chen, 2010

6. Paramere apically smoothly tapering in ventral view ( Chen et al. 2005, fig. 143); aedeagus apically pointed ( Chen et al. 2005, figs 143, 144)................................................... .................................................................. dolichopoda Chen and Wang in Chen et al. (2005) Paramere subapically somewhat expanded; aedeagus apically somewhat roundly expanded................................................................................................................................................... 7

7. Aedeagus submedially strongly narrowed, narrower than half of basal width ( Li et al. 2010, fig. 8D, E).......................................................................... silvana Li, Gao and Chen, 2010 Aedeagus medially somewhat narrowed on distal half, distinctly broader than half of basal width ( Sidorenko 1998, fig. 3)..................... .................... latipalpis ( Sidorenko, 1998)

8. Paramere subapically lacking triangular process ( Figure 8 (b,c))........................................ 9 Paramere subapically with one triangular process ( Figure 9 (b,c))................................. 10

9. Paramere apically acute ( Figure 8 (c)); aedeagus apically hook-like curved dorsad in lateral view ( Figure 8 (c))......................................... ........................................ bingxueae sp. nov. Paramere apically bifurcated ( Chen et al. 2005, fig. 150); aedeagus apically slightly curved ventrad in lateral view ( Chen et al. 2005, fig. 150)...................................................... ........................................................................ nitidifrons Chen and Wang in Chen et al. (2005)

10. Paramere apically slightly bifurcated ( Figure 9 (b,c)); aedeagus expanded ventrad and dorsad on distal one-third in lateral view ( Figure 9 (c))....................... husaensis sp. nov. Paramere apically acute, not bifurcated ( Chen et al. 2005, fig. 147); aedeagus only expanded dorsad on distal one-third in lateral view ( Chen et al. 2005, fig. 147).......... ...................................................................... latifasciata Chen and Wang in Chen et al. (2005)