Tachydromia luang Shamshev & Grootaert, 2005

Grootaert, Patrick & Shamshev, Igor V., 2012, The fast-running flies (Diptera, Hybotidae, Tachydromiinae) of Singapore and adjacent regions, European Journal of Taxonomy 5, pp. 1-162 : 21-22

Tachydromia luang Shamshev & Grootaert, 2005

Figs 11 , 21 , 27-30 , 245

Tachydromia luang Shamshev & Grootaert, 2005b: 115 .

Diagnosis

Medium-sized species with thorax largely brown (not black), subshining, finely pollinose, and prothoracic sclerites yellowish brown; palpus yellow, small, rounded, with very long, black apical bristle; legs with male fore tibia in apical 1/3 and hind tibia in apical 1/6 contrastingly black, otherwise pale yellow; wing with two broad brown bands connected along costa; male terminalia with left cercus bilobed, bearing very long bristles.

Material examined

SINGAPORE: 1 ♂ (holotype), Loyang mangrove, tree trunk, 18 April 1985 (leg. D.H. Murphy; in ZRC); 1 ♀, Chek Jawa, 2 December 2003, mangrove, Mal 1 (reg. 23097, leg. P.G.); 2 ♀♀, Nee Soon, 11 December 2003, swamp forest, Mal 2 (reg. 23121, leg. P.G.); 2 ♀♀, Nee Soon, 24 March 2005, swamp forest, Mal 1 (reg. 25028, leg. P.G.); 1 ♀, Nee Soon, 15 July 2005, swamp forest, Mal 2 (reg. 25259, leg. P.G.); 1 ♀, Nee Soon, 28 October 2005, swamp forest, Mal 1 (reg. 25403, leg. P.G.); 1 ♀, Nee Soon, 3 December 2005, swamp forest, Mal 1 (reg. 25436, leg. P.G.); 1 ♀, Nee Soon, 25 January 2006, swamp forest, Mal 1 (reg. 26020, leg. P.G.); 1 ♀, Sime forest, 1 April 2005, forest, Mal 1 (reg. 25040, leg. P.G.); 1 ♀, Sime forest, 16 September 2005, forest, Mal 1 (reg. 25352, leg. P.G.); 1 ♀, Sime forest, 14 October 2005, forest, Mal 3 (reg. 25386, leg. P.G.); 1 ♀, Sime forest, 3 December 2005, forest, Mal 1 (reg. 25434, leg. P.G.); 1 ♀, Sime forest, 8 February 2006, forest, Mal 2 (reg. 26027, leg. P.G.); 1 ♀, Sime forest, 17 February 2006, forest, Mal 1 (reg. 26034, leg. P.G.).

Distribution

Singapore, Thailand (Loei and Petchabun Provinces).

Habitat and seasonal occurrence

Tachydromia luang has been recorded in only four localities: Loyang and Chek Jawa are mangroves, while Nee Soon and Sime forest are terrestrial rain forests; records almost throughout the year.

Remarks

Although there is such an apparent disjunctive distribution, there is little doubt that the species from Singapore and Northeast Thailand are conspecific. Furthermore, the Singaporean species was found in a mangrove and in rain forest while the Thai specimens were recorded from a mixed deciduous forest at an altitude of 500 m (FIRS Na Haeo, Loei province) and also from Petchabun and Sakhon Nakhon provinces. This phenomenon of disjunctive occurrence in mangrove or coastal forests and in mountains is observed in Empis (Coptophlebia) ( Daugeron & Grootaert 2003) , in Platypalpus (see this paper) and various other hybotid and dolichopodid species ( Grootaert 2009).

Figures

Figs 10-18. Wings of Tachydromiinae. 10. Platypalpus singaporensis sp. nov. 11. Tachydromia luang Shamshev & Grootaert, 2005. 12. Chersodromia sylvicola sp. nov. 13. Chersodromia glandula sp. nov. 14. Drapetis laut sp. nov. 15. Elaphropeza biuncinata (Melander, 1928). 16. Crossopalpus temasek sp. nov. 17. Stilpon laawae Shamshev & Grootaert, 2004. 18. Nanodromia narmjeud Grootaert & Shamshev, 2003.

Figs 19-26. Antennae of Tachydromiinae. 19. Platypalpus singaporensis sp. nov. 20. Platypalpus hualuang Grootaert & Shamshev, 2006. 21. Tachydromia luang Shamshev & Grootaert, 2005. 22. Drapetis mandai sp. nov. 23. Drapetis hutan sp. nov. 24. Chersodromia singaporensis Shamshev & Grootaert, 2005. 25. Crossopalpus temasek sp. nov. 26. Stilpon singaporensis sp. nov.

Figs 27-30. Tachydromia luang Shamshev & Grootaert, 2005, ♂ terminalia. 27. right epandrial lamella, lateral view. 28. epandrium with cerci, dorsal view. 29. left surstylus, lateral view. 30. detail of tip right surstylus, dorsal view (after Shamshev & Grootaert 2005).