Ptilomyia Coquillett.

Stuke, Jens-Hermann, 2021, Taxonomic and faunistic remarks on European Ptilomyia Coquillett (Diptera Ephydridae), Zootaxa 5068 (4), pp. 579-586 : 584

Key to European species of Ptilomyia Coquillett.

1 wing hyaline, dm-cu not dark infuscated; costal index I = 0.9-1.0; frons obviously blueish grey; abdomen densely grey dusted; ♂ terminalia as Fig. 3 : epandrium small and broadly divided before cercus ( Fig. 3 : dep); surstylus complex ( Fig. 3 : su) with large cube-shaped lateral evagination and distinct anteriorly directed medial spine; hypandrium H-shaped ( Fig. 3 : hy); tip of phallus ending in one slightly sclerotised spine ( Fig. 3 : sph)............................ shoka Mathis & Zatwarnicki

- wing slightly brownish, dm-cu distinctly brownish infuscated; costal index I may be <0.9; frons and face brown to blue-grey; abdomen dusted to subshining; ♂ terminalia otherwise........................................................ 2

2 4 rows of acrostichal setae; costal index I <0.85; ♂ tergite 5 subshining and distinctly longer than tergite 4; ♂ terminalia as Fig. 1 : epandrium broad and not divided before cercus, with distinct ventrally directed lateral keels (in dorsal view visible as dark stripes, Fig. 1 : vkep); surstylus ( Fig. 1 : su) medially directed, with submedial teeth; hypandrium more X-shaped ( Fig. 1 : hy); tip of phallus ending in three sclerotised spines ( Fig. 1 : ph)................................... angustigenis (Becker)

- 6 rows of acrostichal setae; costal index I> 0.9; ♂ tergite 5 dusted and only slightly longer than tergite 4; ♂ terminalia as Fig. 2 : epandrium narrow and divided before cerci ( Fig. 2 : dep), without keels; surstylus posteriorly directed, simple shaped with straight edges ( Fig. 2 : su); hypandrium U-shaped ( Fig. 2 : hy); tip of phallus simple, without any sclerotisation or spines ( Fig. 2 : ph)................................................................................. kairensis (Becker)

Figures

FIGS 1-3: Epandrium, cercus, hypandrium and tip of phallus of European Ptilomyia, dorsal view. 1: Ptilomyia angustigenis (Becker, 1926); 2: Ptilomyia kairensis (Becker, 1903); 3: Ptilomyia shoka Mathis & Zatwarnicki, 2017. ce – cercus; dep – division of epandrium before cerci; ep – epandrium; hy – hypandrium; ph – tip of phallus; sph – spine at tip of phallus; su – surstylus; vkep – ventral keel of epandrium.