A scanning electron microscopy (SEM) micrograph showing of the shell of juvenile <i>Haliotis asinina</i>. The shell is 5 mm long.
<ul><li>r - ridge</li>
<li>v - valley</li>
<li>white arrows - regularly spaced respiratory pores.</li></ul>
Daniel J Jackson, Carmel McDougall, Kathryn Green, Fiona Simpson, Gert Wörheide &amp; Bernard M Degnan
CC BY 2.0
Daniel J Jackson, Carmel McDougall, Kathryn Green, Fiona Simpson, Gert Wörheide &amp; Bernard M Degnan. 2006. <i><a rel="nofollow" class="external text" href="http://www.biomedcentral.com/1741-7007/4/40">A rapidly evolving secretome builds and patterns a sea shell</a></i>. BMC Biology 2006, 4:4. 0doi:10.1186/1741-7007-4-40. Cropped from <a rel="nofollow" class="external text" href="http://www.biomedcentral.com/1741-7007/4/40/figure/F1">figure 1c</a>.