Mention the problems of delimiting zoogeographical realms.
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Despite more than 135 years of additional knowledge of
distributions, the shuffling of generic concepts, and the development of computers and complex analytical techniques, Wallace’s zoogeographical regions
appear to be no less valid than they were when he proposed them. Recent
studies re-evaluating Wallace’s scheme should not be considered updates as
such because they have not followed Wallace’s reasoning, and all computerbased analyses, including this one, are subject to the vagaries of the particular
methods used.
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