Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Geology Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Geology; January 1998; v. 26; no. 1; p. 23-26; DOI: 10.1130/0091-7613(1998)026<0023:DOMAEI>2.3.CO;2
© 1998 Geological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Alroy, J.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Diachrony of mammalian appearance events: Implications for biochronology

John Alroy1

1 Department of Paleobiology, Smithsonian Institution, MRC 121, Washington, D.C. 20560

A multivariate biochronological analysis of the North American mammal fossil record has established an independent ordering of appearance events for all described genera and species. This geochronologically confirmed hypothesis shows that first and last appearances in different parts of the continent are highly diachronous. Additional results show that (1) despite this diachrony, the new event sequence is compatible with a previously hypothesized sequence of immigrant first appearances; (2) immigrant genera are not particularly widespread, abundant, or synchronous in their appearances; (3) last appearances, large-mammal appearances, and species-level appearances are the most reliable; and (4) most of the observed diachrony appears to result from undersampling. Because diachrony has little effect on the overall multivariate analysis, and because the differences among classes of events are not extreme, joint analyses of all known appearance events are preferable to the a priori selection of particular appearance events as time indicators.




This article has been cited by other articles:


Home page
 PaleobiologyHome page
J. S. Crampton, M. Foote, A. G. Beu, P. A. Maxwell, R. A. Cooper, I. Matcham, B. A. Marshall, and C. M. Jones
The ark was full! Constant to declining Cenozoic shallow marine biodiversity on an isolated midlatitude continent
Paleobiology, December 1, 2006; 32(4): 509 - 532.
[Abstract] [Full Text] [PDF]

Home page
 PaleobiologyHome page
M. Fortelius, A. Gionis, J. Jernvall, and H. Mannila
Spectral ordering and biochronology of European fossil mammals
Paleobiology, March 1, 2006; 32(2): 206 - 214.
[Abstract] [Full Text] [PDF]

Home page
 PaleobiologyHome page
C. A. E. Stromberg
Evolution of hypsodonty in equids: testing a hypothesis of adaptation
Paleobiology, March 1, 2006; 32(2): 236 - 258.
[Abstract] [Full Text] [PDF]

Home page
 Journal of PaleontologyHome page
STRATIGRAPHY IN PHYLOGENY RECONSTRUCTION--REPLY TO SMITH (2000)
Journal of Paleontology, July 1, 2002; 76(4): 587 - 589.


Home page
 PALAIOSHome page
Stratigraphic Variation in the Timing of First and Last Occurrences
Palaios, April 1, 2002; 17(2): 134 - 146.


Home page
 PaleobiologyHome page
New methods for quantifying macroevolutionary patterns and processes
Paleobiology, December 1, 2000; 26(4): 707 - 733.


Home page
 PaleobiologyHome page
Likelihood tests of hypothesized durations: determining and accommodating biasing factors
Paleobiology, September 1, 2000; 26(3): 431 - 449.



JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Geological Society of America