Author Correction: Collective behaviour in 480-million-year-old trilobite arthropods from Morocco.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Collective behaviour in 480-million-year-old trilobite arthropods from Morocco.

Interactions and coordination between conspecific individuals have produced a remarkable variety of collective behaviours. This co-operation occurs in vertebrate and invertebrate animals and is well expressed in the group flight of birds, fish shoals and highly organized activities of social insects. How individuals interact and why they co-operate to constitute group-level patterns has been extensively studied in extant animals through a variety mechanistic, functional and theoretical approaches.