Pseudostegana latiparma (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 : 2101-2102

The latiparma species group

Pseudostegana latiparma species group: Chen et al. 2005: 422.

Diagnosis

Wing basally with distinct, cross band ( Figure 3 (c, i)).

Key to species of the latiparma group from China

1. Palpus expanded, medially one-third to half as wide as long......................................... 2 Palpus slender, rod shaped.............................................................................................................. 4

2. Paramere apically shallowly bifurcated, subapically lacking small projection, dorsomedially slightly roundly protruding in lateral view ( Chen et al. 2005, figs 95, 96) ....................................................................... bifasciata Chen and Wang in Chen et al. (2005) Paramere apically not bifurcated, subapically with one small, acute projection, dorsomedially triangularly protruding in lateral view.......................................................... 3

3. Ocellar triangle black to brown, broadly elongated to anterior margin of frons ( Li et al. 2010, fig. 1A); scutum yellow on anterior two-thirds, brownish black on posterior one-third; aedeagus gradually expanded from median to base ( Li et al. 2010, fig. 3D).................................................................. acutifoliolata Li, Gao and Chen, 2010 Ocellar triangle brownish yellow, narrowly elongated to anterior margin of frons ( Figure 3 (j)); scutum nearly yellow ( Figure 3 (h,k)); aedeagus medially expanded in ventral view ( Figure 7 (b))....................................... ....................................... nannanae sp. nov.

4. R-m crossvein clear; medial, dark-coloured band neither broadened nor with protruding part............................................................................................................................................. 5 R-m crossvein clouded; medial, dark-coloured band much broadened and with one distinct, protruding part submedially ( Li et al. 2010, fig. 2B)................................................. ....................................................................................................... bilobata Li, Gao and Chen, 2010

5. Paramere apically with expanded lobe-like process and strongly sclerotized, acute projection................................................................................................................................................. 6 Paramere apically pointed, lacking lobe-like process........................................................... 7

6. Paramere subapically triangularly expanded in ventral view ( Figure 6 (b)); aedeagus with slender basal processes, distally roundly expanded in lateral view ( Figure 6 (c)) ................................................................................................................................... latiapicula sp. nov. Paramere subapically roundly expanded in ventral view ( Li et al. 2010, fig. 6D); aedeagus with lobe-like basal processes, distally narrowed, apically hammer-like in lateral view ( Li et al. 2010, fig. 6E).......... .......... minutipalpata Li, Gao and Chen, 2010

7. Paramere subapically triangularly expanded in ventral view ( Chen et al. 2005, fig. 92); basal process of aedeagus membranous, lacking finger-like processes ( Chen et al. 2005, fig. 93)................... .................. angustifasciata Chen and Wang in Chen et al. (2005) Paramere subapically roundly expanded in lateral view ( Chen et al. 2005, fig. 106); basal process of aedeagus with finger-like processes ( Chen et al. 2005, fig. 105)....... ............................................................ pallidimaculata Chen and Wang in Chen et al. (2005)