Comparison of newly available sequence data facilitates reconstruction of the gene inventory of the Urbilateria, the last common ancestors of flies, nematodes and humans. The most surprising outcome is that human genes seem to be closer to the bilaterian roots than previously assumed.
Raible, F., & Arendt, D. (2004, February 3). Metazoan Evolution: Some Animals Are More Equal than Others. Current Biology. https://doi.org/10.1016/S0960-9822(04)00030-2