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Biology / Evolutionary biology / Speciation / Ecology / Sexual selection / Extinction / Macroevolution / Sympatric speciation / Adaptive radiation / Evolution / Key innovation / Pseudoextinction


Proc. Nat. Acad. Sci. USA Vol. 72, No. 2, pp, February 1975 A Theory of Evolution Above the Species Level (paleontology/paleobiology/speciation)
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