Chersodromia nigripennis Shamshev & Grootaert, 2005c: 3
The fast-running flies (Diptera, Hybotidae, Tachydromiinae) of Singapore and adjacent regions
Grootaert, Patrick
Shamshev, Igor V.
European Journal of Taxonomy
2012
2012-01-06
5
1
162
TY7K
Shamshev & Grootaert, 2005
Shamshev & Grootaert
2005
[459,1129,1895,1923]
Insecta
Hybotidae
Chersodromia
Animalia
Diptera
35
36
Arthropoda
species
nigripennis
Figs 58-62
Chersodromia nigripennis Shamshev & Grootaert, 2005c: 3.
Diagnosis Rather small species (about 2.0 mm) with 2 pairs of vertical bristles; very narrow face; black antennae; conical postpedicel with apical stylus; brownish palpi, halters and legs, and usually deeply infuscate wings.
Material examined SINGAPORE: 1 ♂, Chek Jawa, 12 September 2005, mangrove, sweeping (reg. 25343, leg. P.G.); 2 ♀♀, Chek Jawa, 15 December 2005, mangrove, sweeping (reg. 25452, leg. P.G.); 2 ♂♂, 2 ♀♀, Sungei Buloh (SBWR01), 19 May 2009, mangrove, Mal. (reg. 29073, leg. P.G.).
Distribution Singapore. Seasonal occurrence and habitat On beaches in front of mangroves; with flight records in March, May, September, and November- December (most records).
Remarks This species is likely to show dark-winged (most common) and pale-winged forms. We supposed that the dark wings are a local homochromatic adaptation as a camouflage on a black background. The paler specimens might have an advantage on the white sandy patches ( Shamshev & Grootaert 2005c). Chersodromia nigripennisappears to have an intermediate position between the C. incanaand C. cursitansgroups ( sensu Chvála, 1977).