<i>Annularia</i> sp. fossil (Late Carboniferous) founded in <a href="//commons.wikimedia.org/wiki/Le%C3%B3n" title="León">León</a>, in a laboratory of practices of the Faculty of Sciences of the University of <a href="//commons.wikimedia.org/wiki/A_Coru%C3%B1a" title="A Coruña">Corunna</a>.
porshunta
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<span class="int-own-work" lang="en">Own work</span>