A recent comment from the lab was published in Nature in the News and Views Section on the evolution of developmental genes in animals.
With the sequencing of sponge genomes, if is becoming obvious that the standard view of the evolutionary history of developmental genes is somewhat over-simplified. Sponges have ParaHox, NK and possibly HOX genes, pushing back the origins of these important genes even further in evolutionary history.
You can pick up the News and Views article here: Nature 2014 McInerney.
Figure from the News and Views Article: