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Chapter_26_to_post - Chapter 26 Phylogeny and Systematics...

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Chapter 26 Phylogeny and Systematics
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Origin of Earth 4500 Boundaries between units in the Geologic Time Scale are marked by dramatic biotic change Eras
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5 Kingdom classification system in use through the late 1900s
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5 Kingdom classification system in use through the late 1900s gave way to Woese’s 3 Domains
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5 Kingdom classification system in use through the late 1900s gave way to Woese’s 3 Domains and multiple Kingdoms
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“Did K ing P hilip C ome O ver F or G umbo S unday?” Panthera = genus pardus = specific epithet that refers to one species in the genus Panthera Taxon (taxa) = the named taxonomic unit(s) at any level in this taxonomic hierarchy
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Linnaeus convinced us to use a hierarchical classification system Darwin provided us with the mechanism by which evolution results in descent with modification Taxonomy (quiz3 pw) Systematics – naming & classifying organisms according to their evolutionary relationships Phylogenetics – reconstructing the evolutionary relationships among organisms Systematic Phylogenetics
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– hypothesized genealogy traced back to the last common ancestor ( i.e ., the most recent) through hierarchical, dichotomous branching Phylogenetic tree Cladistics – the principles that guide the production of phylogenetic trees, a.k.a., cladograms
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Phylogenetic tree, phylogeny, or cladogram Node – branch point, speciation event
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Lineage or clade – an entire branch Phylogenetic tree, phylogeny, or cladogram
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Lineage or clade – an entire branch Phylogenetic tree, phylogeny, or cladogram
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Lineage or clade – an entire branch Phylogenetic tree, phylogeny, or cladogram
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This note was uploaded on 05/13/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Chapter_26_to_post - Chapter 26 Phylogeny and Systematics...

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