Plants4 - the modern genus Ginkgo should be used to include...

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Plants Unlike marine animals, terrestrial plants for the most part (save the cordaites) escaped the great Permian extinction. The Triassic was a period of transition for the world's floras, as Paleozoic plants such as the calamites and lycopsids declined in favor of newer gymnosperm groups such as the "cycads". During the Triassic up to 20% of the world's flora consisted of cycads, the acme of the group that today has declined to but a few genera restricted to the tropics. Plants possibly allied to the modern ginkgoes have been found in Permian aged sediments. These plants have been classified in the leaf-genera Ginkgoites and Baiera , although recent studies suggest these genera are really morphological variants and that
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Unformatted text preview: the modern genus Ginkgo should be used to include these fossils. During the Mesozoic ginkgoes were worldwide in their distribution and important elements in the gymnosperm forests that dominated the land. Animals Terrestrial faunas of the early Triassic were dominated by therapsids, evolutionary offshoots of the by-then extinct "sail-backs". These therapsids divided into two groups: herbivores and carnivores. The therapsids of this time may have had some sort of "hair" as a body covering as well as some degree of endothermy . By the close of the Triassic therapsids had given rise to early mammals....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Plants4 - the modern genus Ginkgo should be used to include...

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