Head Segmentation in Early Cambrian Fuxianhuia: Implications for Arthropod Evolution

  title={Head Segmentation in Early Cambrian Fuxianhuia: Implications for Arthropod Evolution},
  author={Jun‐yuan Chen and Gui-qing Zhou and Gregory D. Edgecombe and Lars Ramsk�ld},
  pages={1339 - 1343}
The arthropod Fuxianhuia from the Chengjiang fauna displays primitive aspects of cephalic segmentation and trunk limb morphology that indicate a basal position within Euarthropoda. The cephalon consists of an eye-bearing sclerite that articulates with a head shield bearing antennules and subchelate appendages. Eye stalks, antennules, and subchelate appendages are proto-, deuto-, and tritocerebral limbs and organs, respectovely. The anterior position of the eye-bearing sclerite parallels the… 


The headures of several important taxa, Fuxianhuia, Canadaspis, Odaraia, Chengjiangocaris and Branchiocaris are redescribed, revealing the essential similarity between them, including an anterior sclerite that appears to be a widespread feature of basal arthropods.

Specialized appendages in fuxianhuiids and the head organization of early euarthropods

The presence of a pair of specialized post-antennal appendages (SPAs) in the fuxianhuiid head, which attach at either side of the posteriorly directed mouth, behind the hypostome, indicates that antenniform deutocerebral appendages with many podomeres are a plesiomorphic feature of the ancestral euarthropod head.

The origin of crustaceans: new evidence from the Early Cambrian of China

  • J. ChenJ. VannierD. Huang
  • Environmental Science
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2001
This new fossil evidence supports the remote ancestry of crustaceans well before the Late Cambrian and shows, along with other fossil data, that a variety of body plans already coexisted among the primitive crustacean stock.

An exceptionally preserved arthropod cardiovascular system from the early Cambrian.

This work documents in the 520-million-year-old Chengjiang arthropod Fuxianhuia protensa an exceptionally preserved bilaterally symmetrical organ system corresponding to the vascular system of extant arthropods, emphasizing complexity that had evolved by the early Cambrian.

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The 'Cambrian explosion' refers to the major adaptive radiation of the metazoans during the earliest Phanerozoic, an event that is best known by the abrupt appearance of hard parts near to the

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The Lower Cambrian Chengjiang fauna is reviewed and shown to be closely comparable with the younger Burgess Shale fauna. but with various differences in detail. A diverse group of more or less

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New constraint on the division of Cambrian time

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Only so-called "professional" antigen-presenting cells (APCs) of hematopoietic origin are believed capable of inducing T lymphocyte responses. However, fibroblasts transfected with viral proteins