You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis 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
Vol. 1974, No. 3 (Oct. 18, 1974), pp. 635-643
Stable URL: http://www.jstor.org/stable/1442677
Page Count: 9
You can always find the topics here!Topics: Skull, Teeth, Larvae, Bones, Vertebrae, Salamanders, Fossils, Freshwater fishes, Larval development, Vertebrates
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
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.
Preview not available
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.