Reexamination of Yuknessia from the Cambrian of China and first report of Fuxianospira from North America

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Yuknessia Walcott, 1919 recently was transferred from the green algae to the Phylum Hemichordata on the basis of new details observed for the type species, Y. simplex, from the Burgess Shale Formation (Cambrian Stage 5) of British Columbia. This has prompted reexamination of material attributed to Yuknessia from various Cambrian localities in South China. Findings preclude both a Yuknessia and a hemichordate affinity for all of the Chinese study material, and most of this material is formally transferred to Fuxianospira Chen and Zhou, 1997, a taxon common in the Chengjiang biota. Comparable material from the Cambrian Marjum, Wheeler, and Burgess Shale formations of North America is also assigned to Fuxianospira, and this reassignment expands both the paleogeographic and stratigraphic range of this taxon. All aspects of the study specimens, including details obtained from scanning electron microscopy, are consistent with an algal affinity, as proposed in the original descriptions of the Chinese material.


  • Steven T. LoDuca
  • Mengyin Wu
  • Yuanlong Zhao
  • Shuhai Xiao
  • James D. Schiffbauer
  • Jean Bernard Caron
  • Loren E. Babcock
External organisations
  • Virginia Polytechnic Institute and State University
  • University of Missouri-Columbia
  • University of Toronto
  • Ohio State University
  • Eastern Michigan University
  • Guiyang University
  • Guizhou University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Geology
Original languageEnglish
Pages (from-to)899-911
Number of pages13
JournalJournal of Paleontology
Issue number6
Publication statusPublished - 2015 Nov 1
Publication categoryResearch