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Two new non-Gurney papers



Wladimir J. Alonso & Cynthia Schuck-Paim, 2002. Sex-ratio conflicts, kin selection, and the evolution of altruism. Proceedings of the National Academy of Sciences 99(10):6843-6847
M.J. Zanis, D.E. Soltis, Pamela S. Soltis, Sarah Matthews, M.J. Donoghue, 2002. The root of the angiosperms revisited. PNAS 99(10):6848-6853

Both papers -- the first is an excellent foundation for the continuing exploration of game theoretics vis-a-vis theropod behaviour, in my own mind  -- are welcome additions to the literature. The Soltis Laboratory may yet illuminate the origins of angiosperms...the late Cretaceous witnessed an ecological explosion, as it were, with the probability of there being distinct biozones in what is now North America. The recent work of the Scott Sampson team, particularly re: the Kaiparowits Formation, is yielding tantalizing glimpses of the ecomorphological richness of the taxa. As the ornithischians migrated, stalked by predators, there was an intertwining of blooming foliage, pollinating social insects, and herbivore foraging on a large scale. This is one area of dinosaur biology in need of extrapolation. An excellent beginning is in the ongoing scholarship of Atle Mysterud. His 2000 paper, "The relationship between ecological segregation and sexual body size dimorphism in! ! large herbivores" (Oecologia 124(1):40-54), reveals the interesting fact that, in extant herbivores, ecological segregation deriving from sexual dimorphism is very common. If one examines the paleoecological record of the North American biozones, thus, such an interpolation may be applicable to megaherbivores.