Joined: Sep. 2002
|Quote (Zachriel @ Nov. 10 2009,12:37)|
|jerry: it takes over 20 million years to form a new species|
Mark Frank: Where did you get that figure?
Most likely by reading a quote-mine somewhere.
|Prager & Wilson, Slow evolutionary loss of the potential for interspecific hybridization in birds, PNAS 1975: |
Birds have lost the potential for interspecific hybridization slowly... it is inferred that the average hybridization species pair diverged from a common ancestor about 22 million years ago. The corresponding period for frog species pairs capable of hybridization is about 21 million years, while for hybridizable placental mammals it is only 2 to 3 million years. Thus birds resemble frogs in having lost the potential for interspecific hybridization about 10 times as slowly as have mammals.
The key phrase is interspecific hybridization (meaning between different species).
Yes, but to tards who slavishly adhere to the Biological Species Concept, it's not interspecific hybridization when it's between members of the same species. Jerry and his ilk think the species of finches in the Galapagos are actually varieties or subspecies.
Not that it matters of course. Just a useful red herring to deceive the laypeople.
Those who know the truth are not equal to those who love it-- Confucius