Proposed reconstruction of the Cambrian lobopod, Kerygmachela
kierkegaardi, from ref. 20. This animal had typical
onychophoran trunk appendages, but remarkably arthropod-like sensory
appendages at front and back. [Reproduced with permission from the
Royal Society of Edinburgh from Transactions of the Royal
Society of Edinburgh: Earth Sciences, volume 89 (1999 for
1998), pp. 249–290.]