Asiodixa pura 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 : 117-119

Asiodixa pura L. PAPP , sp. n.

( Figs 10–12 , 125 )

Holotype male ( HNHM): THAILAND: Ban Na Lae , nr Pua, over a rocky forest brook, Nov 5, 2004, No. 19, L. PAPP & M. FÖLDVÁRI.

Paratypes: 3 males (one male’s abdomen with genitalia in a plastic microvial with glycerol) 5 females: same data as for holotype .

Measurements in mm: body length 1.85 (holotype), 1.82–2.30 (paratypes), wing length 2.15,

2.12–2.55, wing breadth 0.74, 0.74–0.98.

Head all dark, thorax yellowish grey, mesonotum with a broad brown sagittal band, posthumeral area and middle of nesonotum with a pair of unshapy, diffusely bordered yellow spots.

Length of hind tarsomeres (paratype male): 0.763, 0.275, 0.16, 0.055, 0.07 mm.

Wing ( Fig. 125 ) clear light brown, slightly wider than in A. maculosa . Veins dark brown, in general thicker than is A. maculosa , particularly so for R1 and Rs. Vein H oblique. Length of wing vein sections (multiply with 0.0125 to have them in mm): Sc1 from H: 68.5, Rs (from R1 to R-M) 31.5, R2–5 6.5, R2–3 24, R5 66.5, R-M 10, M1–3 3.5, basal section of M 91, M1-M2 fork 42, M1 23.5, M2 (complete) 15, M-M 6.5, M3 40, M3-Cu 9.5, terminal section of Cu1 22, costal sections: 2: 14.5, 3: 9, 4: 11, 5: 11.5, 6: 16, 7: 17, 8: 33, 9: 18.5. Wing length/Rs ratio 6.3, Rs much longer than in A. maculosa . Second costal section slightly longer, costal section between M3 and Cu1 much longer than in A. maculosa . Cu2 reaching wing margin but 0.135 mm.

As for body characteristics, othrwise similar to A. maculosa .

Genitalia ( Figs 10–12 ) much smaller than those of A. maculosa . Gonocoxites ( Figs 10–11 ) fused U-shaped. Dorsal (fused) wall with a short (0.075 mm) thin pair of cranially directed processes, supporting phallus. Ventrobasal processes blunt, not particularly short. Apical medially directed process thin, apex narrowed. Gonostylus ( Figs 10–11 ) rather short, not longer than apical processes of gonocoxites, apex blunt. Phallus ( Fig. 12 ) ca. 0.34 mm, i.e. shorter than in A. maculosa .

The name of the new species refers to its unspotted wing (the Latin word

‘pura’ means clear, clean, unicolorous).

Dixa pollex ( NOWELL, 1980) – 1 m: PF04/30. Based on my study on its male genitalia, I can state in good faith that this male is conspecific with NOWELL’ s species, which however, is not a Dixella but a Dixa species.

Dixa sp. 1 f: PF04/7. Unfortunately the male specimen from S Thailand (above) and the female from N Thailand are not conspecific. In NOWELL’ s (1980) key it keys out to D. bifasciata BRUNETTI, 1911 from India , but it is surely not conspecific.

Dixella sp. n. 1. 7 m: PF04/9. This is a new species (with shorter and blunt apical lobe on gonocoxite and with longer gonostylus), which will be described elsewhere. Actually the two Dixella spp. here are closely related ones; they key out to D. barraudi FREEMAN, 1948 from India in NOWELL’ s (1980) key (wing clear, no clouds or spots).

Dixella sp. n. 2. 5 m 3 f: FSz03/11; 4 m 3 f: FSz03/18. Another new species with longer and thinner lobe of gonocoxite and apically cut gonostylus.

Figures

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.