Stratigraphic framework and time slices / Calibration of the Ordovician timescale / Measures of diversity / Major terranes in the Ordovician / Isotopic signatures / Ordovician oceans and climate / Was there an Ordovician superplume event? / End Ordovician glaciation / Ordovician sea level changes : a Baltoscandian perspective / Radiolarians / Sponges / Stromatoporoids / Conulariids / Corals / Bryozoans / Brachiopods / Polyplacophoran and symmetrical univalve mollusks / Gastropods / Bivalve and rostroconch mollusks / Nautiloid cephalopods / Tube-shaped incertae sedis / Worms, wormlike and sclerite-bearing taxa / Trilobites / Eurypterids, phyllocarids, and ostracodes / Crinozoan, blastozoan, echinozoan, asterozoan, and homalozoan echinoderms / Graptolites : patterns of diversity across paleolatitudes / Chitinozoans

Conodonts : Lower to Middle Ordovician record / Vertebrates (agnathans and gnathostomes) / Receptaculitids and algae / Acritarchs / Miospores and the emergence of land plants / The ichnologic record of the Ordovician radiation / The Ordovician radiation : toward a new global synthesis