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Lucanus tetraodon, a coleoptera that lives in the woods. The males have very strong jaws f...
Dermal skeleton of a sea urchin. The photo sugggests a rough dihedral symmetry of type D5.
Phacops fecundus, a marine trilobite of the Devonian age. It is characterized by a cephalo...
An anellid that lives as a parasite of mammiferous, amphibian animals and fishes, he has a...
A fossil of trilobite belonging to the genus Olenoides; an extinct sea animal that used to...
We can see an example of dihedral symmetry in this water insect (Dysticus marginalis), tha...
