Dichetophora, Rondani, 1868

Son, Yeongjin & Suh, Sang Jae, 2021, First record of the snail-killing fly genus Dichetophora Rondani (Diptera: Sciomyzidae) in Korea, with descriptions of two new species, Zootaxa 5068 (1), pp. 125-132 : 132

Key to the Palearctic species of the genus Dichetophora

1. Two scutellar setae present.............................................................................. 2

- One scutellar seta present.............................................................................. 4

2. Anterior fronto-orbital seta longer than posterior fronto-orbital seta............................... japonica Sueyoshi

- Anterior fronto-orbital seta shorter than posterior fronto-orbital seta............................................. 3

3. Postpedicel shorter than pedicel; knob-like projection of surstylus bulge in lateral view ( Fig. 2B ); distinct structure of the sternite 5 ( Fig. 2G )......................................................................... koreana sp. nov.

- Postpedicel longer than the pedicel; knob-like projection of surstylus flat in lateral view.............. meleagris (Hendel)

4. One post-alar seta present................................................................ finlandica Verbeke

- Two post-alar setae present.............................................................................. 5

5. Bases of anterior and posterior fronto-orbital setae covered by single large black spot................ kumadori Sueyoshi

- Bases of anterior and posterior fronto-orbital setae covered by separate black spots................................. 6

6. Male surstylus densely covered with long setulae on basally; body-color brown................... obliterata (Fabricius)

- Male surstylus with only 5-6 setulae basally; body-color black.................................. nigricorpa sp. nov.

Figures

FIGURE 2. Postabdominal structures of Dichetophora koreana sp. nov. (male, holotype). A, epandrium and surstylus in posterior view; B, postabdomen in right lateral view; C, hypandrium, pregonite and postgonite in right lateral view; D–F, phallus in left (D) and right (F) lateral and posterior view (E); G, sternite 5; H, syntergosternite 6. Scale bars: A–B, H = 0.2 mm; C–G = 0.1 mm. Abbreviations. ep: epandrium; ST7+8: syntergosternite 7+8; S5: sternite 5; ST6: syntergosternite 6; bp: basiphallus; sur: surstylus; kp: knob-like projection; psg: postgonite; prg: pregonite; hp: hypandrium.