Data from: A vicissicaudatan arthropod from the Silurian Herefordshire Lagerstätte, UK

<p><span>A new arthropod, <em>Carimersa</em> <em>neptuni</em> gen. et sp. nov., is described from the Silurian (Wenlock Series) Herefordshire Konservat-Lagerstätte, UK. The head bears pedunculate eyes and five pairs of appendages. Triflagellate antennae are followed by two pairs of uniramous limbs each with an endopod bearing a pronounced gnathobasic basipod. The posterior two pairs of head limbs and all trunk limbs bear an endopod, exopod and filamentous exite. The trunk consists of ten appendage-bearing segments followed by an apodous abdomen of four segments. The arthropod resolves as sister taxon to <em>Kodymirus</em> and <em>Eozetetes</em> + Aglaspidida. It is the first representative of Vicissicaudata reported from the Herefordshire Lagerstätte and the first Silurian example with well preserved appendages. The preservation of a cluster of radiolarians apparently captured by the trunk appendages is the first direct association of predator and prey discovered in the Herefordshire fauna and suggests that <em>Carimersa</em> was a nektobenthic form that used its gnathobasic basipods in microdurophagy. </span></p>