Dieter Waloszek

TL;DR: A new form from the Lower Cambrian Maotianshan Shale of southern China is regarded as the possible latest offshoot, whereas the other ‘great appendages’ arthropods with similar short grasping limbs were derivatives of the stem lineage of the crown-group Chelicerata.

TL;DR: In several areas of southern Sweden, limestone nodules, locally called Orsten occur within bituminous alum shales, and the name "Orsten" has been referred to particular, mainly arthropod fossils from such nodules and, in a wider sense, to the specific type of preservation of minute fossil through secondarilyphosphatization as discussed by the authors.

TL;DR: Two of the Cambrian Maotianshan-Shale lagerstatten arthropods, Fuxianhuia protensa and Chengjiangocaris longiformis, are reported and their morphologies shed new light on the early evolution of Arthropoda.

TL;DR: The limb morphology and other details of this new species are markedly similar to those of living cephalocarids, branchiopods and copepods and it is assigned to the Eucrustacea, thus representing the first undoubted crown-group crustacean from the early Cambrian.

TL;DR: The arrangement of the elbow joint supports the view that the great appendage evolved into the chelicera of Chelicerata sensu stricto, as similar joints are found in various ingroup taxa such as Xiphosura, Opiliones or Palpigradi.