Phyletic gradualism is a model of evolution which theorizes that most speciation is slow, uniform and gradual. When evolution occurs in this mode, it is usually by the steady transformation of a whole species into a new one (through a process called anagenesis). In this view no clear line of demarcation exists between an ancestral species and a de...
Found on
http://en.wikipedia.org/wiki/Phyletic_gradualism
(from the article `Homo erectus`) A traditional view held by some paleontologists is that a species may be transformed gradually into a succeeding species. Such successive species in ...
Found on
http://www.britannica.com/eb/a-z/p/62
The process of gradual evolutionary change over time.
Found on
http://www.cat-world.com.au/glossary
Phyletic gradualism is a theory that addresses the rate of evolutionary changes over time. In this theory, evolutionary changes occur gradually over time, at a relatively slow, even rate. Phyletic gradualism was defined by Eldredge and Gould to contrast with their theory of phyletic equilibria .
Found on
http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
the belief that evolution (and especially speciation) occurs over considerable time through a slow accumulation of new alleles and changing allele frequencies.
Found on
https://forums.skadi.net/threads/11491-Biogeography-A-Glossary
No exact match found.
