Devonian. Silica Formation. Trilobites comprise a complex and huge clade of arthropods with estimates of number of species exceeding 15,000. The Devonian was punctuated by periods of rising seas that disrupted the reef systems where the trilobites flourished, forcing selective adaptation.
UT Department of Environmental Sciences
The University of Toledo
Digital Initiatives, University of Toledo Libraries
environmental sciences; virtual exhibitions
"Phylum Arthropoda, Class Trilobita" (2017). Rock and Mineral Exhibit. 103.