Acorn worm ossicle ultrastructure and composition and the origin of the Echinoderm skeleton

<p>The excel.data file with ossicle size measurement used to get the mean sizes and supplementary Fig. 2.</p> <p>Raw Raman spectra and R code used to determinate the polymorph of enteropneusts calcium carbonate ossicles, and&nbsp;make Fig.&nbsp;3</p>