Our understanding of the anatomy of the earliest animals has never been better, but we still know next to nothing about their behaviour. Did group behaviour arise recently or is it primeval? To answer this question, researchers from the CNRS, the University of Poitiers, UBO, Claude Bernard Lyon 1 University, Cadi Ayyad University (Marrakech, Morocco), and the University of Lausanne (Switzerland) studied fossilized Moroccan Ampyx trilobites, which lived 480 million years ago. The researchers showed that the trilobites had probably been buried in their positions—all oriented in the same direction, in orderly lines, maintaining close contact with each other through their long spines—during storms. The research is detailed in Scientific Reports.
Read the research paper: Collective behaviour in 480-million-year-old trilobite arthropods from Morocco. Jean Vannier, Muriel Vidal, Robin Marchant, Khadija el Hariri, Khaoula Kouraiss, Bernard Pittet, Abderrazak el Albani, Arnaud Mazurier & Emmanuel Martin. Scientific Reports