Arthropods & Trilobites Meeting - Congress - Symposium
Prague, Czech Republic, and Sardinia, Italy
Summer 2012

TRILO 2012 Conference
The 5th Conference on Trilobites and their relatives, 1st July – 4th July 2012, Prague, Czech Republic

Lee Ann Hally

Name:Mrs. Lee Ann Hally
Institution:University of New England
Address:Earth Sciences
University of New England
NSW 2351



Middle Cambrian (Series 3) trilobite and agnostid biofacies of East Gondwana: Beta diversity trends in space and time and implications for palaeogeography

Lee Ann Hally & Dr John Paterson
Section: Palaeobiology and palaeoecology, Presentation: Poster
Palaeoecology, palaeogeography
Middle Cambrian (Series 3) trilobite and agnostid biofacies of East Gondwana: Beta diversity trends in space and time and implications for palaeogeography L.A. HALLY1 & J.R. PATERSON1 1 Division of Earth Sciences, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia (; Cambrian Series 3 was a time of passive plate convergence on the eastern Gondwanan margin (comprising Australia, New Zealand and Antarctica), and a period of widespread carbonate and organic-rich sediment deposition. Extensive shallow shelf sediments of this age dominate northern Australian sedimentary basins, as well as those in South Australia, New South Wales, Victoria, Tasmania, New Zealand and Antarctica. Trilobite and agnostid assemblages are well documented for many Cambrian Series 3 successions in these regions, including material from outcrop and drillcore, and occur in a variety of marine lithologies, ranging from coarse-grained clastics to black shales, phosphorites and carbonates. A preliminary binomial presence/absence matrix of all Cambrian Series 3 trilobite and agnostid genera from dozens of East Gondwanan localities has been constructed for each of the three stages (Stage 5, Drumian and Guzhangian) using the available literature. Genus level is considered the most appropriate taxonomic rank for an analysis of the various local assemblages of each stage, due to the endemism of many species even between regions of East Gondwana. Preliminary statistical analyses, using the software package PAST, have been performed, demonstrating similarities between regions based on shared genera. Initial results indicate that the clustering of faunal assemblages corresponds to the similar depositional environments they inhabited, ranging from very shallow inner shelf to deep outer shelf settings (below storm wave base), in addition to the continental slope. There is a considerable increase in East Gondwanan trilobite and agnostid diversity throughout Cambrian Series 3, with the Guzhangian showing a very marked increase in genera, perhaps reflecting a global marine transgression during this time that expanded the continental shelf along the East Gondwanan margin. .


NEW PHOTOS: Participant's photos
Participant's photos

NEW PHOTOS: Sessions and dinner
Photos from sessions and the conference dinner

NEW PHOTOS: Mid-conference trip
Photos from Mid-conference field trip

NEW PHOTOS: Pre-conference trip and Icebreaker party
Photos from Pre-conference field trip and the Icebreaker party


26th – 29th June: Field trip
Lower Palaeozoic of the Barrandian area, Czech Rep.

1st – 4th July: Conference
Geoscience Building of the Faculty of Science of Charles University, Albertov 6, Praha 2, Prague, Czech Republic (maps)

5th – 9th July: Field trips
Sardinian Lower Palaeozoic, Italy and Late Palaeozoic in Moravia, Czech Republic


Oldřich Fatka
Charles University
Prague, Czech Republic

Petr Budil
Czech geological Survey
Prague, Czech Republic

Contact e-mail:
conf (at) trilo2012 (dot) org

Sponsors and organisers of the 5th International Trilobite Conference

5th International conference on Trilobites and their relatives TRILO2012, July 2012, Prag, Czech Republic | Webdesign Pavel Bokr | Logotype Radko Šarič | Ilustrations Iva Vyhnánková | savana