Origin and Diversification of the Family
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Extremely important for dating the appearance of oestrids is the presence of Tracheomyiinae in Australia. As already mentioned (Part C), two possibilities exist to explain their presence there: (i) oestrids colonized Australia from the Oriental Region by a long-range, island-hopping dispersal, a sweepstake route; (ii) oestrids in Australia are relicts of an ancient, peri-Antarctic, Gondwanan distribution.
KeywordsEarly Cretaceous Late Jurassic Spreading Rate Antarctic Peninsula Rift Valley
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