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Redescription of the cheloniellid euarthropod Triopus draboviensis from the Upper Ordovician of Bohemia, with comments on the affinities of Parioscorpio venator
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Ancestral morphology of crown-group molluscs revealed by a new Ordovician stem aculiferan
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The Fezouata Biota : an exceptional window on the Cambro-Ordovician faunal transition
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A holomorph approach to xiphosuran evolution: a case study on the ontogeny of Euproops
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Diverse Middle Ordovician palaeoscolecidan worms from the Builth-Llandrindod inlier of central Wales