If you need an accessible version of this item please contact JSTOR User Support

Chancelloria, an Enigmatic Fossil from the Bright Angel Shale (Cambrian) of Grand Canyon, Arizona

David K. Elliott and Daryl L. Martin
Journal of the Arizona-Nevada Academy of Science
Vol. 21, No. 2 (1987), pp. 67-72
Stable URL: http://www.jstor.org/stable/40024887
Page Count: 6
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Chancelloria, an Enigmatic Fossil from the Bright Angel Shale (Cambrian) of Grand Canyon, Arizona
Preview not available

Abstract

Calcareous spicules from the Cambrian Bright Angel Shale of Grand Canyon, Arizona are identified as Chancelloria, an enigmatic fossil initially described by Walcott (1920) as a sponge. More recent work has suggested that the mode of growth of this organism is unlike that found in sponges and that it is in fact allied to other problematic Cambrian organisms that produced similar sclerites. The structure of the specimens from Grand Canyon supports that view, and they are therefore assigned to the class Coeloscleritophora (Bengtson and Missarzhevsky 1981) Phylum unknown.

Page Thumbnails

  • Thumbnail: Page 
[67]
    [67]
  • Thumbnail: Page 
68
    68
  • Thumbnail: Page 
69
    69
  • Thumbnail: Page 
70
    70
  • Thumbnail: Page 
71
    71
  • Thumbnail: Page 
72
    72