Aphantorhaphopsis, Townsend, 1926

Tachi, Takuji & Shima, Hiroshi, 2023, Systematic study of the subgenus Aphantorhaphopsis of the genus Siphona in East Asia and the Oriental Region (Diptera: Tachinidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 63 (1), pp. 213-247 : 215-216

Key to East Asian and Oriental species of Aphantorhaphopsis

1 Abdomen shining black in ground color ( Figs 86–87 ); abdominal tergite 3 without median marginal setae. .... 2

– Abdomen yellowish, brownish or blackish in ground color ( Figs 88–91 , 95); abdominal tergite 3 with a pair of median marginal setae. ......................................... 3

2 R 1 setulose dorsally on entire length. .......................... ............................................. S. (A.) expleta sp. nov.

– R 1 setulose dorsally on apical half. .............................. .......................... S. (A.) perispoliata ( Mesnil, 1953)

3 Labella pad-like ( Figs 88, 90 , 98). ........................... 4

– Labella elongate, 0.8–1.0 times as long as prementum (Figs 94–96). .......................................................... 15

4 R 1 setulose dorsally on apical half. ........................... 5

– R 1 bare or with 1–3 setulae dorsally on apical portion. ............................................................................... 7

5 Three postsutural dorsocentral setae. ....................... 6

– Four postsutural dorsocentral setae. ............................ ................................ S. (A.) hongkongensis sp. nov.

6 Abdomen shining light brown in ground color, with whitish pruinosity on anterior margin of each tergite; gena wide, approximately 0.25 of eye height (Fig. 92); ultimate section of M 4 0.8–1.0 times as long as crossvein dm-m. ............. S. (A.) samarensis ( Villeneuve, 1921)

– Abdomen yellow in ground color, almost without pruinosity, posterior half of tergites 3–5 black; gena narrow, approximately 0.2 of eye height; ultimate section of M 4 1.3 times as long as crossvein dm-m. ................ ........................................ S. (A.) seminigra sp. nov.

7 Three postsutural dorsocentral setae. ....................... 8

– Four postsutural dorsocentral setae. ....................... 14

8 Vertex very narrow, approximately 0.17 of head width. ............. S. (A.) angustifrons ( Malloch, 1930)

– Vertex 0.30–0.45 of head width. ............................... 9

9 Abdomen orange or light yellow in ground color, without pruinosity. .................................................. 10

– Abdomen varied in ground color, with pruinosity. ... 11

10 Fronto-orbital plate with yellow pruinosity; frontal vitta orange; vertex approximately 0.32 of head width; gena 0.17–0.20 of eye height (Fig. 93). ............................... ............................. S. (A.) selangor ( Malloch, 1930)

– Fronto-orbital plate with brownish pruinosity; frontal vitta pale brown; vertex 0.33–0.37 of head width; gena 0.20–0.23 of eye height ( Fig. 90 ). ............................... ................................. S. (A.) laboriosa Mesnil, 1957

11 Abdominal tergites 4–5 entirely blackish, with whitish gray pruinosity on anterior part ( Fig. 89 ). ................... ......................................... S. (A.) kanmiyai sp. nov.

– Abdominal tergites 4–5 brownish or yellowish in ground color, with blackish longitudinal vitta or bands on posterior 1/2–4/5 ( Fig. 88 ). ................................ 12

12 Fronto-orbital plate with brownish pruinosity; frontal vitta reddish brown; thoracic dorsum slightly dark gray. ..................................... S. (A.) coactilis sp. nov.

– Fronto-orbital plate with yellowish pruinosity; frontal vitta orange or light yellow; thoracic dorsum gray. ....... 13

13 Male postabdomen with surstylus nearly straight and tapered to apex in lateral view ( Fig. 63 ). ..................... ......................... S. (A.) orientalis ( Townsend, 1926)

– Surstylus thickened and slightly curved dorsally on apical 1/ 5 in lateral view ( Fig. 25 ). ............................. ..................................... S. (A.) matsumotoi sp. nov.

14 Abdomen blackish in ground color; gena approximately 0.25 of eye height; R 1 bare. .................................. ............................ S. (A.) laticornis ( Malloch, 1930)

– Abdomen gray in ground color; gena approximately 0.18 of eye height (Fig. 97); R 1 with 1–3 setae dorsally on apical portion. ............ S. (A.) apicisetosa sp. nov.

15 Three postsutural dorsocentral setae; R 1 bare. ........ 16

– Four postsutural dorsocentral setae; R 1 bare or setulose dorsally on apical half. ........................................... 17

16 Prementum subequal in length to eye height; labella slightly shorter than prementum (Fig. 95). .................. ............................. S. (A.) crassulata ( Mesnil, 1953)

– Prementum long, approximately twice as long as eye height; labella subequal in length to prementum (Fig. 96). ................................... S. (A.) nepalensis sp. nov.

17 R 1 setulose dorsally on apical half. .............................. ............................................ S. (A.) curvata sp. nov.

– R 1 bare. ................................................................... 18

18 Labella elongate, subequal in length to prementum; gena narrow, approximately 0.15 of eye height (Fig. 94). ............................. S. (A.) alticola ( Mesnil, 1953)

– Labella approximately 0.8 times as long as prementum; gena wide, approximately 0.2 of eye height. ...... ................................................ S. (A.) curta sp. nov.

Figures

Figs 86–91.Adult male habitus of Siphona (Aphantorhaphopsis) spp. 86 – Siphona (Aphantorhaphopsis) expleta sp. nov. (paratype, Philippines); 87 – S.

Figs 63–66. Male postabdomen of Siphona (Aphantorhaphopsis) orientalis (Townsend, 1926) (Taiwan, Taipei). 63 – epandrium, cerci and surstylus in lateral view; 64 – epandrium, cerci and surstylus in dorsal view (setae omitted on left side); 65 – hypandrium, pregonite, postgonite and phallus in lateral view; 66 – fifth abdominal sternite in ventral view (setae omitted on left side). Scale bars = 0.1 mm.

Figs 25–29. Male and female postabdomen of Siphona (Aphantorhaphopsis) matsumotoi sp. nov. (paratype, Japan). 25 – epandrium, cerci and surstylus in lateral view; 26 – epandrium, cerci and surstylus in dorsal view (setae omitted on left side); 27 – hypandrium, pregonite, postgonite and phallus in lateral view; 28 – fifth abdominal sternite in ventral view (setae omitted on left side); 29 – female postabdomen in lateral view. Scale bars = 0.1 mm.