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Unformatted text preview: Outline 13 Evolutionary (old) vs. Phenetic (1960's-70's) vs. Cladistic (1970's-80's) classification philosophies Evolutionary - Appearance + branching order considered together, Linnaean graded classification Phenetic - Overall similarity (many = weight characters), Linnaean graded classification Cladistic - Branching order alone, new features at each node, nested cladogram diagram & classification Monophyletic vs. paraphyletic vs. polyphyletic taxa Clad. Phen., Evol. Phen., Evol. -------- Speciation models Phyletic gradualism (old) vs. Punctuated equilibrium (1972&#2; ) Slow continuous change in whole species vs. almost no change in main populations (stasis) + rapid change in isolated populations...
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- Spring '08