A challenge to all of these alternative scenarios came when Turner and colleagues in 2007 described a new dromaeosaurid, Mahakala, which they found to be the most basal and most primitive member of the Dromaeosauridae, more primitive than Microraptor.
Izazov svim ovim alternativnim scenarijima došao je kada su Turner i kolege 2007. godine opisali novog dromeosaurida, Mahakalau, koja se danas smatra najprimitivnijim pripadnikom Dromaeosauridae, primitivnijim i od Microraptora.