Lecture 9: February 24

• Re-read Chapters 3 and 5 textbook.
• Lecture by J. Lipps on Cambrian Explosion
• There are many web sites with information on the Burgess Shale. There are many links in this web-enhanced version of a paper by S. J. Gould, 'Play it again. life',
• P. F. Hoffman and D. P. Schrag, 2000, Snowball Earth, Scientific American, January 2000 (web version) ; reading for thursdays' lecture

Writing Assignment:

Choose a group from the following: Gastropoda, Bivalves, Cephalopoda, Starfish, articulate Brachiopoda, Arthropoda. Write 1-2 pages about this group, including its Phylum, its overall body plan and skeleton (including symmetry), its earliest representative in the fossil record, the time that this earliest representative was living; its mode of locomotion and reproduction (including presence/absence of a larval stage).

• Descriptions of Phyla on class web site

We watched David Attenborough's movie on Phyla of animals: 'Building Bodies', the second movie in the series 'Life on Earth'. The text is also available in the class room as Chapter 2 (Building Bodies) in Attenborough's book of the same name.