Cladogenesis, Anagenesis, & Extinction

An evolutionary lineage, illustrating cladogenesis (lineage splitting at nodes A, B, C, D & E), anagensis (evolutionary change between these points), and extinction (termination of secondary lineages arising from nodes A, C, & D). The hatched and shaded portions represent a lineage that splits at node B by cladogenesis and diverges therafter by anagenesis as two separate lineages. (after Minkoff 1983)

Text material © 2002 by Steven M. Carr