M_W_Chapter_21-2A_Later_Paleozoic_Life_partial_short_version - Pale ozoic Life(continue d xtinction at e of Ordovician wipe out m nd d ost Mass e

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Paleozoic Life (continued) Mass extinction at end of Ordovician wiped out most warm-water invertebrates Survivors: cold-adapted animals fromhigh latitudes or deep water Low diversity in Silurian Marineecosystemrecovered by Devonian
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What lived in the Middleand Late Paleozoic? Marineinvertebratesnew species of trilobites, brachiopods, corals, graptolites (until end Silurian) etc. trilobites become less abundantstraight nautiloids gradually replaced by the ammoniteancestors (mostly coiled)“sea scorpions” (Eurypterids) becomedominant predators in the Silurian
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Eurypterids(“Sea scorpions”)dominant predators in Silurian, spreading into freshwater environments
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What lived in the Middleand Late Paleozoic?
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  • Fall '08
  • RICHTER
  • Geology, Ordovician, RTE, inant pre dators, theMiddleand Late, Marineinve brate

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