Chinese Science Bulletin

, Volume 49, Issue 10, pp 1063–1071 | Cite as

A rare lobopod with well-preserved eyes from Chengjiang Lagerstätte and its implications for origin of arthropods

Articles

Abstract

The origin of arthropods has long been one of the most hotly-debated subjects. Arthropods used to be thought closely related with annelids, but the two groups are now believed to be separated into two major realms within Protostomia on the basis of new molecular data. Although it is generally held by paleontologists that arthropods should be rooted in the early lobopods-a kind of worm-like creature with non-segmented legs, no intermediate forms have been found to bridge them. Here we report an organism with a mixture of characters, including features characteristic of arthropods (e.g., primary cephalization with paired eyes, paired antennae, and preliminary tagmosis) and of lobopods (e.g., worm-like body design, the dorsal spines, and non-segmented limbs or lobe-like legs). The discovery of the rare transitional form may throw new light on the origin of arthropods and suggests that the most primitive arthropods began with paired uniramous legs and the biramous ones evolved later.

Keywords

Lobopod with eyes Cephalization Origin of arthropods Early Cambrian Chengjiang fossil Lagerstätte 

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Copyright information

© Science in China Press 2004

Authors and Affiliations

  • Jianni Liu
    • 1
  • Degan Shu
    • 1
    • 2
  • Jian Han
    • 1
  • Zhifei Zhang
    • 1
  1. 1.Early Life Institute & The Key Laboratory of Continental DynamicsNorthwest UniversityXi’anChina
  2. 2.School of Earth Sciences and ResourcesChina University of GeosciencesBeijingChina

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