A new thalassematid echiuran worm from the Middle Ordovician Castle Bank Biota of Wales, UK por JOSEPH P. BOTTING, LUCY A. MUIR

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A new species of the problematic organism Webbyites from the Early Ordovician Fezouata Biota of Morocco por Lucy A. Muir, Juan Carlos Gutiérrez-Marco

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Discovery of missing link between demosponges and hexactinellids confirms palaeontological model of sponge evolution por Joseph P. Botting, Yuandong Zhang, Lucy A. Muir

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Ordovician opabiniid-like animals and the role of the proboscis in euarthropod head evolution por Stephen Pates, Joseph P. Botting, Lucy A. Muir, Joanna M. Wolfe

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A miniature Ordovician hurdiid from Wales demonstrates the adaptability of Radiodonta por Stephen Pates, Joseph P. Botting, Lucy M. E. McCobb, Lucy A. Muir

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Three-dimensionally preserved soft tissues and calcareous hexactins in a Silurian sponge: implications for early sponge evolution por Ardianty Nadhira, Mark D. Sutton, Joseph P. Botting, Lucy A. Muir, Pierre Gueriau, Andrew King, Derek E. G. Briggs, David J. Siveter, Derek J. Siveter

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