Catagenesis (biology)

Catagenesis is an archaic term from evolutionary biology referring to evolutionary directions that were considered "retrogressive." It was a term used in contrast to anagenesis, which in present usage denotes the evolution of a single population into a new form without branching lines of descent.

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Evolutionary biology

Evolutionary history of life Index of evolutionary biology articles Outline of evolution Timeline of evolution

Evolution	Abiogenesis Adaptation Common descent Evidence of common descent Extinction Last universal ancestor Macroevolution Microevolution Panspermia Speciation

Population genetics	Gene flow Genetic drift Mutation Natural selection

Development	Canalisation Evolutionary developmental biology Inversion Modularity Phenotypic plasticity

Evolution of taxa	Birds origin Brachiopods Cephalopods Dinosaurs Fish Fungi Insects butterflies Life Mammals cats dogs dolphins and whales horses humans lemur sea cows Molluscs Plants Reptiles Spiders Tetrapods Viruses influenza

Evolution of organs	Cell DNA Flagella In eukaryotes eucaryote cell chromatin endomembrane system mitochondria nucleus plastids In animals eye hair auditory ossicle nervous system brain

Evolution of processes	Aging Death Programmed cell death Avian flight Biological complexity Cooperation Color vision in primates Emotion Empathy Ethics Eusociality Immune system Metabolism Monogamy Morality Mosaic evolution Multicellularity Sexual reproduction Gamete differentiation/sexes Life cycles/nuclear phases Mating types Sex-determination

Tempo and modes	Tempo phyletic gradualism/punctuated equilibrium Modes gradualism/saltationism micromutation/macromutation uniformitarianism/catastrophism

Modes of speciation	Allopatric Anagenesis Catagenesis Cladogenesis Hybrid speciation Parapatric Peripatric Sympatric

Related topics	Ecological genetics Molecular evolution Phylogenetics Polymorphism Protocell Systematics

History	Biological classification Charles Darwin On the Origin of Species Gene-centered view History of evolutionary thought Modern evolutionary synthesis Extended Evolutionary Synthesis

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Catagenesis (biology)

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References