The family occurs on all continents but more
diversified in Australian and South American continents. In the holarctic region
only two genera namely Colletes and Hylaeus are known.
Important publications that should be consulted regarding phylogeny of this
family are Michener and Brooks (1984) and Michener (1992). Larvae were described
by McGinley (1981) and pupal characters were tabulated with emphasis on
differences among subfamilies by Torchio and Burwell (1987).
Summary of included subfamilies and tribes and, their respective
genera found in our specified region: