Access

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 Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

A New Coiled-Stemmed Camerate Crinoid from the Permian of Eastern Australia

R. J. Willink
Journal of Paleontology
Vol. 54, No. 1 (Jan., 1980), pp. 15-34
Stable URL: http://www.jstor.org/stable/1304157
Page Count: 20
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A New Coiled-Stemmed Camerate Crinoid from the Permian of Eastern Australia
Preview not available

Abstract

A new dichocrinid camerate Neocamptocrinus is proposed for a number of coiled stemmed species from the Permian of eastern Australia. As its name reflects, the genus closely resembles Camptocrinus Wachsmuth and Springer from the Carboniferous of North America, but it is distinguished by an inflated tegmen and a stem that is bilateral for its entire length. Three species are unreservedly assigned to the genus: N. bundanoonensis n.sp. (the type from Kazanian sediments in New South Wales), N. wardenensis n.sp. and N. millerensis n.sp. A further seven species are tentatively assigned to the genus because they are defined mainly on stem morphology. They are a revised N? tasmaniensis (Sieverts-Doreck), N? sp. cf. N? tasmaniensis (Sieverts-Doreck), N? sievertsae n.sp., N? doreckae n.sp., N? bernacchiensis n.sp., N? banksi n. sp. and N? gremialis n.sp. The stem is subject to greater variation than the calyx. A number of specimens show the precise morphology of their tegmens. Prior to this study only the species Camptocrinus alabamensis Strimple and Moore provided information on the form and composition of tegmens associated with this group of dichocrinids.

Page Thumbnails

  • Thumbnail: Page 
15
    15
  • Thumbnail: Page 
16
    16
  • Thumbnail: Page 
17
    17
  • Thumbnail: Page 
18
    18
  • Thumbnail: Page 
19
    19
  • Thumbnail: Page 
20
    20
  • Thumbnail: Page 
21
    21
  • Thumbnail: Page 
22
    22
  • Thumbnail: Page 
23
    23
  • Thumbnail: Page 
24
    24
  • Thumbnail: Page 
25
    25
  • Thumbnail: Page 
26
    26
  • Thumbnail: Page 
27
    27
  • Thumbnail: Page 
28
    28
  • Thumbnail: Page 
29
    29
  • Thumbnail: Page 
30
    30
  • Thumbnail: Page 
31
    31
  • Thumbnail: Page 
32
    32
  • Thumbnail: Page 
33
    33
  • Thumbnail: Page 
34
    34