You are not currently logged in.
Access your personal account or get JSTOR access 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.
Tytthaena parrisi, Oldest Known Oxyaenid (Mammalia, Creodonta) from the Late Paleocene of Western North America
Philip D. Gingerich
Journal of Paleontology
Vol. 54, No. 3 (May, 1980), pp. 570-576
Published by: SEPM Society for Sedimentary Geology
Stable URL: http://www.jstor.org/stable/1304200
Page Count: 7
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
A new genus and species of Oxyaenidae, Tytthaena parrisi from the middle Tiffanian Cedar Point Quarry in northwestern Wyoming, is the oldest known member of this family. Tytthaena is approximately 20% smaller than any previously described oxyaenid. Morphologically it resembles late Tiffanian Oxyaena and Dipsalodon more closely than any other Paleocene genus. The early appearance of Tytthaena and the broad radiation of Oxyaenidae in North America suggest that this family is of North American or possibly Central American origin. Derivation from a palaeoryctid such as late Cretaceous Cimolestes, as others have suggested, is plausible but not yet well substantiated.
Journal of Paleontology © 1980 SEPM Society for Sedimentary Geology