An early Cambrian hemichordate zooid.
Hou XG, Aldridge RJ, Siveter DJ, Siveter DJ, Williams M, Zalasiewicz J, Ma XY.
Hou XG, et al.
Curr Biol. 2011 Apr 12;21(7):612-6. doi: 10.1016/j.cub.2011.03.005. Epub 2011 Mar 31.
Curr Biol. 2011.
PMID: 21439828
Free article.