Sphaerexochus

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1	Phylogenetic and Biogeographic Analysis of Sphaerexochine Trilobites Curtis R. Congreve, Bruce S. Lieberman Department of Geology and Biodiversity Institute, University of Kansas, Lawrence, Kansas, United States of Amer Add to Reading List Source URL: eeb.ku.edu Language: English* - Date: 2013-12-22 12:21:51 Cheiruridae Trilobite Ordovician Deiphon Ceraurus Caledonian orogeny Sphaerexochus Avalonia Cephalon Phanerozoic Paleozoic Geologic time scale