Animal of <i>Haliotis asinina</i> with a shell size of approximately 1 – 10 mm maintain this complexity in pigmentation which follows a simple set of rules: blue dots occur against a maroon background, orange dots against a cream background. Tremata (t) and ridges (arrowheads) have also developed.
Daniel J Jackson, Gert Wörheide and Bernard M Degnan
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<p>Cropped from Figure 1 <a rel="nofollow" class="external free" href="http://www.biomedcentral.com/1471-2148/7/160/figure/F1?highres=y">http://www.biomedcentral.com/1471-2148/7/160/figure/F1?highres=y</a> from:<br></p>
Daniel J Jackson, Gert Wörheide and Bernard M Degnan: <a rel="nofollow" class="external text" href="http://www.biomedcentral.com/1471-2148/7/160">Dynamic expression of ancient and novel molluscan shell genes during ecological transitions</a>. - BMC Evolutionary Biology 2007, 7:160. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1186%2F1471-2148-7-160">10.1186/1471-2148-7-160</a>