The Arganthomyza setiplanta group

The A. setiplanta group is diagnosed by several apomorphies supporting its monophyly, viz. frontal triangle very long; hind basitarsus basally with 1–3 short thickened ventral setae; ventral receptacle abruptly attenuated distally to form a nnger-like apical projection. In addition, the reduced submembranous caudal process of the transandrium and the construction of the distal part of the saccus with reduced tubercles are probably (the male of A. setiplanta remains unknown) further synapomorphies of this group according to ROHÁĆEK & BARBER (2013). The monophyly of this group has also been recently connrmed by ROHÁĆEK & TÓTHOVÁ (2014) by analysis of molecular data. Three species are included: A. setiplanta, A. versitheca and A. carbo, but only the latter occurs in the Nearctic Region.