Skip to Main Content
Book Chapter

A synopsis of Ordovician trilobite distribution and diversity

Jonathan M. Adrain
Jonathan M. Adrain
Search for other works by this author on:
January 01, 2013


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.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables


Geological Society, London, Memoirs

Early Palaeozoic Biogeography and Palaeogeography

D. A. T. Harper
D. A. T. Harper
Durham University, UK
Search for other works by this author on:
T. Servais
T. Servais
CNRS–Université de Lille 1, France
Search for other works by this author on:
Geological Society of London
ISBN electronic:
Publication date:
January 01, 2013




A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now