Abstract
AbstractThe Chengjiang fossil lagerstätte has yielded four described species of dinocaridids. These have been interpreted either as arthropods or as arthropod progenitors, occasionally with the anomalocaridid Parapeytoia yunnanensis serving as a link. This view is rejected both because anomalocaridids have a number of derived characters absent from early arthropods, and also because a shared origin gives a more parsimonious picture. Sclerites thought to belong to the mouth of P. yunnanensis differ fundamentally from those of its holotype and from those of other dinocaridids. It appears that they belong to a new large priapulid, described here as Omnidens amplus gen. et sp. nov. Copyright © 2006 John Wiley & Sons, Ltd.
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