Earth Sciences 1083F/G Lecture Notes - Lecture 16: Yoho National Park, Burgess Shale, Stephen Jay Gould
12 Sep 2016
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Document Summary
Skeletons in the closest: the evolution of hard parts in metazoa and. Remember earliest complex metazoa (ediacaran fauna) were all soft bodied (no skeletonized tissue). Everything was getting food from water or from bacteria. Pound quartzite: ediacara hills, north of sydney, australia, metazoan fossils found in 1946. Very first complex forms of life were first found in this rock: originally found in a type of sandstone. Classification: lumped together as medusoids : same classification as a jellyfish. Details originally overlooked: a diverse assemblage of fossils. Hox genes dictate the duties of particular cells (for particular purposes) Vendozoa is the same thing as ediacaran. While things from the past look similar to things in the modern day, they are fundamental different. Represented an extinct phylum or an extinct kingdom: soft bodied quilted structure (fluid-filled bags?, mat stickers : fixed to seafloor, photosynthesizers, mat scratchers : grazed on microbial mats.
