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Chinese Science Bulletin

, Volume 51, Issue 3, pp 358–363 | Cite as

New observations of the lobopod-like worm Facivermis from the early cambrian Chengjiang Lagerstätte

  • Liu Jianni 
  • Han Jian 
  • Simonettaa M. 
  • Hu Shixue 
  • Zhang Zhifei 
  • Yao Yang 
  • Shu Degan 
Articles

Abstract

Facivermis yunnanicus (Hou & Chen, 1989), from the Early Cambrian Chengjiang Lagerstätte, a worm-like fossil with 5 pairs of tentacles and a perceived shrunken end, has been regarded as related to polychaetes, later it has been variously interpreted as lobopods, Pentastoma and lophophorates. Newly discovered complete specimens by the ELI field team show that the taxon has, in addition to the 5 pairs of appendages, a pear-shaped trunk end bearing two or three circles of hooks. Accordingly, based on these important morphological characters, reconsideration of its affinities is provided and the taxonomy is remedied herein. Because the five pairs of appendages of Facivermis yunnanicus resemble the appendages of the fore-trunk of lobopod Miraluolishania (Liu & Shu, 2004), it seems that they are homologous structures. Therefore, the affinities of Facivermis are regarded here as being close to the lobopods, in addition, the lobe-like appendages of Facivermis are very crucial to exploring the origin of the appendages of lobopods and arthropods.

Keywords

lobopods origin of the appendages Lower Cambrian Chengjiang Lagerstätte 

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Copyright information

© Science in China Press 2006

Authors and Affiliations

  • Liu Jianni 
    • 1
  • Han Jian 
    • 1
  • Simonettaa M. 
    • 2
  • Hu Shixue 
    • 3
  • Zhang Zhifei 
    • 1
  • Yao Yang 
    • 1
  • Shu Degan 
    • 1
    • 4
  1. 1.Early Life Institute and the Key Laboratory of Continental DynamicsNorthwest UniversityXi’anChina
  2. 2.Dipartimenoto di Biologia Animale e Genetica “L.Pardi”Unversita di Firenzevia Romana 17
  3. 3.Yunnan Geological InstituteKunmingChina
  4. 4.School of Earth Sciences and ResourcesChina University of GeosciencesBeijingChina

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