GEL 107 (16)

GEL 107 (16) - GEL107: PALEOBIOLOGY What are invertebrates?...

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1 GEL107: PALEOBIOLOGY Lecture 17: Invertebrates І What are the Cambrian explosion and its two main faunas? What are invertebrates? When did invertebrates appear and what is Ediacaran fauna? “Invertebrates” Animals excluding vertebrates = Non-vertebrate metazoans Archaea (Methanogens) Eubacteria (Cyanobacteria) Plants Metazoa (animals) Eukaryotes Sponges Cnidarians Bilaterians Metazoa (animals) Sponges Cnidarians Bilaterians Vertebrates non-vertebrate bilaterians Invertebrates Vertebrates What are the Cambrian explosion and its two main faunas? What are invertebrates? When did invertebrates appear and what is Ediacaran fauna?
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2 Molecular estimate 900-1100 ma Fossil Record Ediacaran (ca. 630-540 ma) http://uregina.ca/~radenbat/paleo/labs2002/ediacara_fauna.htm Mowsonites (Cnidarian, jellyfish?)
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3 http://uregina.ca/~radenbat/paleo/labs2002/ediacara_fauna.htm Kimberella (mollusc?) Dickinsonia (annelid?) http://uregina.ca/~radenbat/paleo/labs2002/ediacara_fauna.htm http://uregina.ca/~radenbat/paleo/labs2002/ediacara_fauna.htm Spriggia (arthropod? annelid?)
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This note was uploaded on 12/13/2009 for the course GEL GEL 107 taught by Professor Jishin during the Spring '09 term at UC Davis.

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GEL 107 (16) - GEL107: PALEOBIOLOGY What are invertebrates?...

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