Session Topics:

Phylogeny and Macroevolution – Bruce Lieberman and Rhi LaVine

This session will be devoted to talks that employ phylogenetic approaches to study trilobites and their relatives, and to talks that consider the nature of macroevolutionary patterns and processes in these groups.

Paleo-Evo-Devo and Functional Morphology – Thomas Hegna & Mark Webster

This session includes talks that focus on development and functional morphology of trilobites and their relatives, and on how function and development influenced arthropod evolution.

Exceptional Preservation – Rudy Lerosey-Aubril

The outstanding fossil record of trilobites stems from a heavy calcification of their dorsal exoskeleton (and hypostome), which started remarkably early in ontogeny. However, other parts of the body – the ventral exoskeleton, the appendages, and all the internal organs – were much more prone to decay and as such, rarely preserved in fossils. Likewise, most Palaeozoic marine arthropods, including trilobite closest relatives, lacked biomineralized structures entirely and therefore can only be recovered from remarkable strata known as Konservat-Lagerstätten.

This session will focus on the ‘soft’ anatomy of trilobites and their relatives. Together, we will explore the taphonomic circumstances allowing the fossilization of non-biomineralized features in arthropods, and discuss the unique insights provided by exceptionally preserved fossils on the biology of trilobites and their relatives.

Trilobites and Environments: synecology to paleogeography – Fernanda Serra

This is a combined session of talks from the IGCP Project 735 “Rocks and the Rise of Ordovician Life” and IGCP 668 “Equatorial Gondwanan History and Early Palaeozoic Evolutionary Dynamics”.

Systematics and Biostratigraphy

This session will be devoted to the description of new taxa and faunas, their evolutionary relationships, and their occurrence geographically and in the stratigraphic record.