With an understanding of cladogenesis and anagenesis
, students can better appreciate the distinction between descent from a common ancestor and relationships among coexisting modern species.
Arnold discusses how anagenesis
of hybrid origin is a problem for conservation biologists and lawmakers trying to protect endangered species, as well as taxonomists and conservation philosophers who depend on unchanging diagnosable characters.
of autopoiesis depends on the openness of biological systems.
This branch length correlation measures the similarity in the amount of anagenesis
(reconstructed character state change) that has occurred along each branch of a phylogeny.
The important difference between branching cladogenesis and either continuous anagenesis
or bifurcating cladogenesis (such as assumed in many comparative biology techniques; e.
and the importance of stratigraphy to paleobiology.
It arose as a conceptual macromutation on November 24, 1859 -- "disgorged," as Mencken (1931) put it, "in one stupendous and appalling dose" -- and has undergone stasis or slow anagenesis