Drosophilinae

The Drosophilinae are the largest subfamily in the Drosophilidae. The other subfamily is the Steganinae.
A huge amount of research has shown the way the fly has evolved many species as it spread across the world.
The genus "Drosophila" is paraphyletic because several genera (with many species), such as "Zaprionus", "Scaptomyza" and "Lordiphosa", are within the genus. What this means is that they have evolved from more standard "Drosophila" over time. This is pretty well supported by the evidence of their genome.
In taxonomy, there are two ways of solving this kind of problem:
Genus "Drosophila" could be raised to a supergenus, or the related offshoot genera could be demoted to subgenera.