A new notostracan crustacean, Strudops goldenbergi gen. et sp. nov., is described from the well-preserved terrestrial arthropod fauna of the Upper Devonian of Strud, Belgium. The fossil notostracan bears a close resemblance to modern notostracans in possessing a large, simple head shield covering almost half of the whole body, a set of phyllopodous thoracic appendages and a legless posterior abdomen with a telson bearing a caudal furca. The differentiation and relative size of mouthparts and limbs suggest that these specimens are all adults. The notostracans described herein are the earliest clear members of the total group Notostraca. ; Character matrixCharacter matrix in TNT format.branch_matrix.TNTOptimal treesTrees from the phylogenetic analysis.Optimal_trees.treStrudops_char.listList of characters and character states used for the phylogenetic analysis.Lagebro_appS1_char.list.doc