![](http://www.alamy.com/thumbs/6/1E53A507-B45A-49DE-A19A-D796FC9A77E4/D25KWW.jpg)
Trilobites Kettneraspis seiberti, Lower Devonian
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Photo credit: © Roberto Nistri / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: devonian, fauna, horizontal, invertebrates, kettneraspis, nistri, roberto, seiberti, trilobites