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.

Parallelism in the Proteidae Reconsidered

John H. Larsen, Jr. and Dan J. Guthrie
Copeia
Vol. 1974, No. 3 (Oct. 18, 1974), pp. 635-643
DOI: 10.2307/1442677
Stable URL: http://www.jstor.org/stable/1442677
Page Count: 9
  • Read Online (Free)
  • Download ($12.00)
  • 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.
Parallelism in the Proteidae Reconsidered
Preview not available

Abstract

Since the work of Hecht (1957), the relationship between Proteus and Necturus has been in doubt. The present investigation, based primarily on certain cephalic features, has reconsidered the case for parallelism at the familial level for these perennibranchiates. They share structures, unique among urodeles, as part of their sound-transmitting mechanism: a columellar process of the squamosal, and heterotopic ossifications within the lig. squamoso-columellare. They are also fundamentally alike in chromosome pattern and n number, hyobranchial apparatus and tooth structure and organization. They appear to be extremely ancient perennibranchiates as indicated by numerous shared specializations super-imposed on their basic neotenic habitus. After reexamination of morphological, paleontological, zoogeographic and behavioral data, it is concluded that the preponderance of available evidence supports the early workers, such as Noble (1931), who assigned these two genera to the same family, the Proteidae.

Page Thumbnails

  • Thumbnail: Page 
635
    635
  • Thumbnail: Page 
636
    636
  • Thumbnail: Page 
637
    637
  • Thumbnail: Page 
638
    638
  • Thumbnail: Page 
639
    639
  • Thumbnail: Page 
640
    640
  • Thumbnail: Page 
641
    641
  • Thumbnail: Page 
642
    642
  • Thumbnail: Page 
643
    643