Ary progenitors nw monkeys guinea pigs etc

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Unformatted text preview: c.) –  E.g. Gondwanaland breakup  ­ explain distribu?on of ancient groups like ra?tes and marsupials 15 4/12/13 Dispersal- Range Expansion – European Starling – 100 NYC 1896 90 NYC 1890, 80 more in 1891 Vicariance – Saxifrage w/ relic populations “When he lies asleep, And in his ear I’ll holla ‘Mortimer!’ Nay, I’ll have a starling shall be taught to speak Nothing but ‘Mortimer,’ and give it him, To keep his anger still in motion.” [1st Henry IV – I, 3] Phylogenetic relationships as indicators of biogeographic history (Fig 6.9) Dispersal vs Vicariance A.  Dispersal A to B B.  Vicariance Paraphyly C.  Vicariance w/ speciation and extinction Complications: 1)  Extinction in C 2)  Speciation in A 16 4/12/13 AREA CLADOGRAMS: MARSUPIAL EXAMPLE CONGRUENT BIOGEOGRAPHIES (Comparative Phylogeography) Example of analysis: (6.10) Hawaiian Islands and phylogeny of crickets – Younger groups on younger islands 17 4/12/13 Madagascar, Chameleons, Carnivores Dispersal from Madagascar – not vicariance Mongoose-like carnivores - Dispersal to Madagascar – not vicariance Gondwanan Distributions – Cichlid fishes and Lungfishes 18 4/12/13 Regional Biotas •  Allochthonous – taxa originated elsewhere •  Autochthonous – taxa evolved within region •  South America (examples) –  Autochthonous = rheas and lungfish (Gondwanan) –  Allochthonous – diversi...
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