Bilateria

The bilateral animals, or "Bilateria," appeared in the fossil record in the early Cambrian about 542 million years ago, quickly diversifying into all of the major animal groups, or phyla, still alive today.

Verum Serum 2008

Expansion of the SOX gene family predated the emergence of the Bilateria

As Expected 2008

Our data indicate that this mediolateral architecture was present in the last common bilaterian ancestor and thus support a common origin of nervous system centralization in Bilateria.

You have the brains of a worm... - The Panda's Thumb 2007

The situation in cnidarians is therefore very different to that even in very derived members of the Bilateria.

Jellyfish lack true Hox genes! - The Panda's Thumb 2006

These fossils provide the first evidence confirming the phylogenetic inference that Bilateria arose well before the Cambrian.

Fun with Hominin Cranial Capacity Datasets (and Excel) - The Panda's Thumb 2006

Something is very wrong with this picture because the way these body parts develop in diverse branches of the Bilateria actually share little in the details of their respective pattern formation processes.

Dembski vs. Evo Devo - The Panda's Thumb 2005

As cnidarians were shown to be the sister-group of the Bilateria

PLoS ONE Alerts: New Articles 2009

De Robertis EM, Sasai Y (1996) A common plan for dorsoventral patterning in Bilateria.

PLoS ONE Alerts: New Articles 2009

Clytia hemisphaerica confronted with available data from other cnidarian species and from the Bilateria led us to reassess the early evolution of Hox and Hox-related genes family.

PLoS ONE Alerts: New Articles 2009

Thanks to the availability of data concerning other cnidarian species, it becomes now feasible to address the role of Hox genes in the common ancestor of Cnidaria, before extending the comparison to the more distantly-related Bilateria, a task for which two distinct levels of interrogation should be distinguished.

PLoS ONE Alerts: New Articles 2009