Did homeobox gene duplications contribute to the Cambrian explosion?

Intact cluster and chordate-like expression of ParaHox genes in a sea star

(2013) Rossella Annunziata et al.   BMC BIOLOGY

Causes of the Cambrian Explosion

(2013) M. P. Smith et al.   SCIENCE

Evolution of homeobox genes

(2012) Peter W. H. Holland   Wiley Interdisciplinary Reviews-Developmental Biology

The dynamics of vertebrate homeobox gene evolution: gain and loss of genes in mouse and human lineages

(2011) Ying-fu Zhong et al.   BMC EVOLUTIONARY BIOLOGY

HomeoDB2: functional expansion of a comparative homeobox gene database for evolutionary developmental biology

(2011) Ying-fu Zhong et al.   EVOLUTION & DEVELOPMENT

The Cambrian Conundrum: Early Divergence and Later Ecological Success in the Early History of Animals

(2011) D. H. Erwin et al.   SCIENCE

Conservation of ParaHox genes' function in patterning of the digestive tract of the marine gastropod Gibbula varia

(2010) Leyli Samadi et al.   BMC DEVELOPMENTAL BIOLOGY

Expression of Hox genes during the larval development of the snail, Gibbula varia (L.)—further evidence of non-colinearity in molluscs

(2010) Leyli Samadi et al.   DEVELOPMENT GENES AND EVOLUTION

Clustered Fox genes in lophotrochozoans and the evolution of the bilaterian Fox gene cluster

(2010) Sebastian M. Shimeld et al.   DEVELOPMENTAL BIOLOGY

Do cnidarians have a ParaHox cluster? Analysis of synteny around a Nematostella homeobox gene cluster

(2010) Jerome H. L. Hui et al.   EVOLUTION & DEVELOPMENT

Broad phylogenomic sampling improves resolution of the animal tree of life

(2008) Casey W. Dunn et al.   NATURE

The Ediacaran emergence of bilaterians: congruence between the genetic and the geological fossil records

(2008) K. J Peterson et al.   PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Statistical Tests between Competing Hypotheses of Hox Cluster Evolution

(2008) Robert Lanfear et al.   SYSTEMATIC BIOLOGY