References

**All images taken by Liz Ross unless otherwise noted - All specimens are from the paleontology collection at Carleton University, Ottawa, Ontario, Canada. A special thanks to Beth Halfkenny for giving me the chance to sift through the collection.**

Alroy, J. 1998. Cope’s Rule and the Dynamics of Body Mass Evolution in North American Fossil Mammals. Science. 280: 731-734.

Arnold, A.J. , D.C. Kelly & W.C. Parker. 1995. Causality and Cope’s rule: Evidence from the planktonic foraminifera. Journal of Palaeontology. 69: 203-210.

Clegg, S.M. & I.P.F. Owens. 2002. The “island rule” in birds: medium body size and its ecological explanation. Proc. R. Soc. Lond. 269: 1359-1365.

Gould, S.J. 1997. Cope’s rule as psychological artefact. Nature. 385: 199-200.

Hallam, A. 1975. Evolutionary size increase and longevity in Jurassic bivalves and ammonites. Nature. 258: 493-496.

Hone, D.W.E. & M.J. Benton. 2005. The evolution of large size: how does Cope’s Rule work? Trends in Ecology and Evolution. 20: 4-6.

Jablonski, D. 1997. Body-size evolution in Cretaceous molluscs and the status of Cope’s rule. Nature. 385: 250-252.

Kingsolver, J.G. & D.W. Pfennig. 2004. Individual-level selection as a cause of Cope’s rule of phyletic size increase. Evolution. 58: 1608-1612.