A 3-D computer illustration of colonies of the extinct marine animals known as Dictyonema (genus of Graptolites) of the Ordovician period (which occurred from 505 to 438 million years ago). Dictyonema is characterized by branch-like assemblages of graptolite organisms that were suspended by a soft tissue float that allowed the species to drift via sea currents feeding on floating organic particles with their feather-like tentacle. Though purely an artistic interpretation, the structure of the animal is inferred through scientific notation of what the species may have looked like within the environment in which they existed.

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