Abstract
A MAJOR area of speculation in palaeobiology is the search for the “causes” of massive cross-group extinctions such as that at the end of the Cretaceous. A controversial recent addition to the literature on the phenomenon of extinction itself is the work of Van Valen1, who attempts to show that extinctions are stochastically constant over time for given groups of organisms. Lacking from Van Valen's study of group survivorship, however, is consideration of the history of diversification within each group. In an empirical study I have attempted to demonstrate features common to the diversifications of lower vertebrates and other organisms.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
