Give us Feedback!
Set the category for this topic
Arts & Culture
Biology & Nature
Business & Companies
Food & Drink
Geography & Travel
Health & Medicine
History & Events
Religion & Philosophy
Society & Politics
Technology & Computing
Transportation & Vehicles
- Created 2012-04-01
, also known as "phyletic change", is the
of species involving an entire
rather than a branching event, as in
. When enough
s have occurred and become stable in a population so that it is significantly differentiated from an ancestral population, a new
name may be assigned. A key point is that
the entire population
is different from
the ancestral population
such that the ancestral population can be considered
. A series of such species is collectively known as an evolutionary
It is easy to see from the preceding definition how controversy can arise among taxonomists as to when the differences are significant enough to warrant a new species classification. Anagenesis may also be referred to as "gradual evolution".
The philosopher of science Marc Ereshefsky argues that
are the result of anagenesis. The lineage leading to birds has diverged significantly from lizards and crocodiles, allowing evolutionary taxonomists to classify birds separately from lizards and crocodiles, which are grouped as reptiles.
, it has been suggested that social anagenesis/aromorphosis be viewed as universal or widely diffused social innovation that raises social systems' complexity, adaptability, integrity, and interconnectedness.
from Wikipedia (last updated: 20 June), licensed under
What do you know about this topic?
Please make sure to only add personal information and experiences about this topic that complements the article above. Comments or opinions should be posted at the bottom of the page by clicking
. Thanks alot for contributing!
...or create an Experience Page
Currently no applications. Add an application using the contribute box to the right.
Let People Vote
Ask a Question
Diagram contrasting Anagenesis and Cladogenesis from the University of Newfoundland
Add new image
Add image by copy and paste a link:
Add external link
Links to external pages
Add related topic
Links to related topics
Copyright 2011 © Empedia.com BETA
Forgot your password?