Catagenesis (biology) - Definition and Overview

Catagenesis refers to forms of evolution that are retrogressive. It is a term used in contrast to anagenesis, which is the evolution of a single population into a new form without branching lines of descent (cladogenesis).

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Basic topics in evolutionary biology
Processes of evolution: macroevolution - microevolution - speciation
Mechanisms: selection - genetic drift - gene flow - mutation
Modes: anagenesis - catagenesis - cladogenesis
History: Charles Darwin - The Origin of Species - modern evolutionary synthesis
Subfields: population genetics - ecological genetics - human evolution - molecular evolution - phylogenetics - systematics - evo-devo
List of evolutionary biology topics \| Timeline of evolution

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