Paleonet: Biostratigraphic datums - a question

Peter Roopnarine proopnarine at
Wed Apr 18 18:40:16 GMT 2007

On Wednesday 18 April 2007 10:19, Steve C. Wang wrote:
> Here are some articles on calculating range extensions that account for the
> incompleteness of the fossil  record:
Steve W. is correct. There are a number of ideas out there for dealing with 
this problem properly. While the mid-point approach mentioned in the original 
posting addresses the issue, I don't think that it is statistically 
legitimate. And yes, how come no mention of the Signor-Lipps effect? Here is 
another article that might be helpful:
Hayek, L. C. and E. Bura  On the ends of the taxon range problem. 
In "Evolutionary Patterns", (J. B. C. Jackson, S. Lidgard and F. K. McKinney 
eds.). U. Chicago Press.

Dr. Peter D. Roopnarine, Associate Curator
Department of Invertebrate Zoology & Geology
California Academy of Sciences
875 Howard St.
San Francisco CA 94103

Phone: (415) 321-8271
FAX: (415) 321-8615
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