Chersodromia singaporensis 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 : 40-41

Chersodromia singaporensis Shamshev & Grootaert, 2005

Figs 66-69

Chersodromia singaporensis Shamshev & Grootaert, 2005c: 6 .

Diagnosis

Rather small (about 1.5 mm) species with 1 pair of vertical bristles, broad face, brown basal antennal segments, postpedicel having long dorsoapical extension, brownish palpus, katepisternum largely shining, brownish yellow legs, pale halteres and finely infuscate wings.

Material examined

SINGAPORE: 1 ♂, Chek Jawa, 15 December 2005, mangrove, sweeping (reg. 25452, leg. P.G.); 2 ♂♂, 1 ♀, Chek Jawa, 22 December 2005, mangrove, Mal 1 (reg. 25455, leg. P.G.).

Distribution

Singapore.

Habitat and seasonal occurrence

Only found on white sandy beaches or in mangroves with at least sandy patches; rarely in the burrows of Ghost crabs, Ocypode sp. Flight period is from October and December (most records).

Remarks

This species belongs to the C. speculifera group sensu Chvála (1977) but, actually, is closely related to three species of Chersodromia described from Papua New Guinea ( Grootaert 1992). All these species differ from C. singaporensis by pale yellowish ( C. flavipyga Grootaert, 1992 ) or yellowish-white ( C. micra Grootaert ) to pale whitish ( C. nigripyga Grootaert, 1992 ) palpus and by the lack of a presutural supra-alar (= posthumeral) bristle.

Figures

Figs 66-69. Chersodromia singaporensis Shamshev & Grootaert, 2005, ♂. 66. antenna, lateral view. 67. right epandrial lamella, lateral view. 68. epandrium and cerci, dorsal view. 69. left surstylus, lateral view. (after Shamshev & Grootaert 2005).