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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Faunal and paleoenvironmental changes at a Cambrian (Jiangshanian; Steptoean–Sunwaptan boundary interval) trilobite extinction event, in contrasting deep- and shallow-subtidal settings, Nevada and Oklahoma Open Access
The Early Ordovician bathyurid trilobites Licnocephala and Ibexocephala Open Access
The Ordovician trilobite Oenonella and the new family Oenonellidae, with new species from western Newfoundland, Canada Open Access
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 Available to Purchase
Systematics of the Early Ordovician (late Tremadocian; Stairsian) trilobite Gonioteloides Kobayashi, with species from the Great Basin, western USA Open Access
Articulated trilobite ontogeny: suggestions for a methodological standard Open Access
Persistent oceanic anoxia and elevated extinction rates separate the Cambrian and Ordovician radiations Available to Purchase
Biogeographic Shifts in a Transgressive Succession: The Cambrian (Furongian, Jiangshanian; Latest Steptoean–Earliest Sunwaptan) Agnostoid Arthropods Kormagnostella Romanenko and Biciragnostus Ergaliev in North America Available to Purchase
A synopsis of Ordovician trilobite distribution and diversity Available to Purchase
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.