Asiodixa L. PAPP, 2006

Papp, L., Merz, B. & Földvári, M., 2006, DIPTERA OF THAILAND A summary of the families and genera with references to the species representations, Acta Zoologica Academiae Scientiarum Hungaricae 52 (2), No. 2, pp. 97-269 : 114-115

Asiodixa L. PAPP , gen. n.

( Figs 2–12 , 124–125 )

Type species: Asiodixa maculosa L. PAPP , sp. n.; other included species: A. pura L. PAPP , sp. n. Gender: feminine.

Very small dixids, wing length 2.0– 2.5 mm. Frons convex without any setae. Scape very short ventrally ( Fig. 4 ). Pedicel bulbous.

Flagellum very long, male first flagellomere with a ventromedial dilatation at about middle ( Figs 2,

4–5), other basal flagellomeres long cylindrical. Female first flagellomere long cylindrical. Apical flagellomeres ( Fig. 3 ) medium long, apex with medium long setae only. Palpus with 5 palpomeres, 3–5 rather long. Proboscis not particularly long.

Wing with long S-curved Rs section ( Figs 124–125 ).

Male genitalia basically more similar to those of Dixella , than to those of Dixa : gonocoxite with an apical medially directed process. Dorsal wall of gonocoxites with a long pair of cranially directed processes ( Figs 9–10 ). Phallus ( Figs 6 , 12 ) long or very long, thread-like.

The presence of a long pair of dorsal cranially directed processes of gonocoxites (dorsally to phallus) is in direct connection with the existence of long filiform phallus. The Thaii Dixella spp. have those and also some of the Palaearctic Dixella spp. , e.g. D. filiformis (EDWARDS) , too. No such long phallus and dorsal processes found in any Dixa spp. By this feature and some other characteristics I believe that the new genus is closer to Dixella than to Dixa .

Scales: 0.1 mm for Figs 2–3 , 0.2 mm for Fig. 4

Figures

Figs 2–5. Asiodixa maculosa sp. n., paratype male, head and antenna: 2 = basal flagellomeres, 3 = apical flagellomeres, 4 = head with basal parts of antennae, anterior view (pedicel and first flagellomere turned upwards), 5 = head and right antenna, sublateral view (del. A. SZAPPANOS).

Figs 6–9. Asiodixa maculosa sp. n., paratype male, genitalia. 6 = phallus, dorsal view, apex lateroclinate, 7 = gonostylus and apex of gonocoxite, dorsal view, 8 = genital complex, ventral view

Figs 10–12. Asiodixa pura sp. n., paratype male. 10 = genitalia, dorsal view, 11 = genitalia, ventral view, 12 = phallus, lateral view. Scale: 0.1 mm for all

Figs 124–125. Asiodixa spp., wings.124 = A. maculosa sp. n.; 125 = A. pura sp. n.