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Unformatted text preview: (650 to 544 million years ago), and is characterized by the appearance of soft-bodied animal fossils. Multicellular animal fossils and burrows (presumably made by unknown multicellular animals) first appear 700 million years ago, during the late precambrian time. All known Proterozoic animal fossils had soft body parts: no shells or hard (and hence preservable as fossils) parts. There are some paleontologists who suspect that the Vendian faunas were reduced by an extinction event, possibly related to massive glaciation, at the close of the vendian time. In any event, many animals in the Vendian assemblages are quite unlike anything living today, while others can be traced to extant phyla....
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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.
- Fall '10