Vertebrate(Lecture ppt) Ch 1-2

Vertebrate(Lecture ppt) Ch 1-2 - Phylogenetic system the...

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Primitive Generalized Specialized Derived (modified) – different from the ancestral condition - apomorphy - feet of terrestrial vertebrates Shared derived character - synapomorphies Plesiomorphies – similar to the ancestor - vertebral column Shared ancestral character - synpleiomorphies advanced – more recent or more specialized Vestigial =- better developed in an ancestor Rudimantary – structures that became more fully exploited in descendants (phylogeny) - a structure that is undeveloped or not fully developed (ontogeny)
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Only shared derived character can be used to determine genealogies is the core of cladistic
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Unformatted text preview: Phylogenetic system the history of an evolutionary lineage can be reconstructed only on the basis of derived (modified) characters Parsimonious phylogeny the phylogeny requiring the fewer number of evolution change derived character - synapomorphies Cladistic analysis selection of morphologic traits to be employed in reconstructing phylogenetic relationships Clade unique to the group and derived from a common ancestor Parsimonious phylogeny the phylogeny requriring the fewer number of evolution change Metamorphosis ? ? ? Ostracoderm...
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This note was uploaded on 12/28/2011 for the course LSCI 102 taught by Professor Chien-pingwang during the Fall '11 term at National Cheng Kung University.

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Vertebrate(Lecture ppt) Ch 1-2 - Phylogenetic system the...

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