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The phylogenetic affinity of the Ordovician trilobites Agerina , Forteyaspis gen. nov., and related genera, with new and revised species from Canada and the United States
Systematics of the Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi, with species from the Great Basin, western USA
Articulated trilobite ontogeny: suggestions for a methodological standard
Persistent oceanic anoxia and elevated extinction rates separate the Cambrian and Ordovician radiations
Biogeographic Shifts in a Transgressive Succession: The Cambrian (Furongian, Jiangshanian; Latest Steptoean–Earliest Sunwaptan) Agnostoid Arthropods Kormagnostella Romanenko and Biciragnostus Ergaliev in North America
A synopsis of Ordovician trilobite distribution and diversity
Abstract Ordovician trilobites are reviewed based on a new species-level relational database. The stratigraphical ranges of all 56 families with occurrences in the Ordovician are documented and the content, phylogenetic status, diversity and Ordovician distribution by major palaeocontinent/terrane are discussed. Aspects of higher classification are also dealt with. Global sampling is heavily biased towards a small number of highly sampled areas. Much of the world has a very limited record of formally named trilobite species. Even within heavily sampled units, sampling is patchy by environment and time. Genus endemism was at a peak in Laurentia, Baltic, and Avalonia in the Floian and declined more-or-less steadily through the remainder of the Ordovician.