plesiomorph(adj.plesiomorphic) A primitive character state, comprising features that are shared by different groups of biological organisms and are inherited from a common ancestor. The word means ‘old-featured’. Compare apomorph.
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plesiomorphic , plesiomorphic Applied to a character state that is based on features shared by different groups of biological organisms and inherited from a common a… Synapomorphy , synapomorphy synapomorphy The possession of apomorphic features by two or more taxa in common (i.e. the features are shared, derived). If the two gro… Apomorph , apomorphic Applied to an evolutionarily advanced character state. The long neck of the giraffe is apomorphic; the short neck of its ancestor is plesi… synapomorphic , synapomorphic Applied to apomorphic features that are possessed by two or more taxa in common (i.e. the features are shared, derived). If the two gro… Quantitative Inheritance , quantitative inheritance The inheritance of a character (known as a quantitative character or trait) that depends upon the cumulative action of many… Phylogeny , Before the mid-1800s, classification of organisms into groups, called taxa , was generally based on overall similarity of physical appearance. There…
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