Hawaii (was Limits of Kinds - now its crabs)

David Campbell (bivalve@mailserv0.isis.unc.edu)
Thu, 20 Nov 1997 15:54:44 -0400

>At 09:58 PM 11/19/97 -0600, Glenn wrote:
>>There is still a matter of being old enough given that each species of
>>mammal appears to last around 3 million years.
>Hasn't in your thinking modern man appeared in that time??? If so it should
>be time enough to answer some of your questions.

The problem is the question of time of arrival of different organisms. The
land snails in Hawaii evolved several genera and a few subfamilies to
families. They probably represent early arrivals that have island hopped
(since early to mid Oligocene, islands have existed in the chain, though
the current large islands are no older than latest Miocene in origin).