Asiodixa maculosa 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 : 116-117

publication ID	https://doi.org/ 10.5281/zenodo.12586111
persistent identifier	https://treatment.plazi.org/id/03A487CE-FF81-F508-E80A-FE2ED0DDFA03
treatment provided by	Felipe
scientific name	Asiodixa maculosa L. PAPP
status	sp. nov.

Treatment

Asiodixa maculosa L. PAPP View in CoL , sp. n.

( Figs 2–9 View Figs 2–5 View Figs 6–9 , 124 View Figs 124–125 )

Holotype male ( HNHM, left hind tarsi lost): THAILAND: Nan Prov., over and along the rivulet above Mae Charim waterfall, Nov 7–8, 2004, No. 25, L. PAPP & M. FÖLDVÁRI.

Paratypes: 18 males 5 females: same data as for the holotype ; 1 male 2 females: Mae Fang N. P., over and along a forest brook, Nov 1, 2004, No. 14, leg. L. PAPP & M. FÖLDVÁRI .

(apex of gonostyli omitted), 9 = gonocoxites, dorsal view. Scale: 0.1 mm for all

Measurements in mm: body length 1.58 (holotype), 1.50–1.81 (paratypes), wing length 2.06 (holotype), 2.05–2.30 (paratypes), wing breadth 0.67 (holotype), 0.65–0.76 (paratypes).

Dark grey, prothorax, coxae and femora yellowish (fore coxae brown in some specimens, incl. holotype), in some specimens also pleura yellowish grey. Frons strongly shiny. Thorax yellowish grey dusted.

Male first flagellomere much modified ( Figs 2, 4–5 View Figs 2–5 ), that of the females long cylindrical; flagellomeres 2–9 very long, flagellomeres 10–14 medium long ( Fig. 3 View Figs 2–5 ). Flagellomeres length (one male paratype): 1: 140, 2: 122, 3: 115, 10: 36, 11: 36, 12: 34, 13: 33, 14 (apical) 35 (divide those data by 667 to get them in mm, so 1st 0.21 mm). First flagellomere of a female 0.29 mm long, apical flagellomere 0.06mm.

All coxae dark brown. Knees dark brown. Hind tibia dilated apically. Tarsomeres of hind leg (paratype male) 0.837, 0.30, 0.163, 0.055, 0.07 mm.

Wing light brown, veins brown. A large brown spot present from basal 1/3 of Rs to M1–3 ( Fig. 124 View Figs 124–125 ). Fringe on hind margin 0.08 mm. Vein H oblique. M1 and M2 slightly upcurving. M2 broken, not joining M1. Length of wing vein sections (multiply with 0.0125 to have them in mm): Sc1 from H: 61, Rs (from R1 to R-M) 18, R2–5 5.5, R2–3 21.5, R5 59.5, R-M 11, M1–3 4, basal section of M 79.5, M1-M2 fork (ca., since base of M2 lost) 35.5, M1 (ca., see before) 24, M2 (visible part) 14, M-M 4.8, M3 37.5, M3-Cu 6.2, terminal section of Cu1 22.5, costal sections: 2: 10, 3: 8, 4: 10, 5: 9.5, 6: 14.5, 7: 14, 8: 20.5, 9: 16.5. Wing length/Rs vein ratio 10. Halteres dark grey.

Genitalia much larger than in A. pura . Gonocoxites ( Figs 7–9 View Figs 6–9 ) fused rather V-shaped. Dorsal (fused) wall with a long (0.17 mm) pair of cranially directed processes, supporting phallus. Ventrobasal process rather broad and blunt, medial process with 5 long setae. Apical medially directed process (similar to that of Dixella spp. ) digitiform with sharp apex ( Figs 7–9 View Figs 6–9 ). Proctiger with a pair of large caudal apical setae. Phallus ( Fig. 6 View Figs 6–9 ) very long, 0.52 mm, apex lateroclinate. Gonostylus ( Fig. 7 View Figs 6–9 ) long, slightly inclinate, apex sharp, medially with medium long setae.

The name of this new species refers to the brown central spot on its wing. That is the obvious and easily detectable difference from A. pura . However, details of the male genitalia are also markedly different. Therefore I do not think that the two species are closely related.