Life Before the Dinosaurs Part 2

Life Before the Dinosaurs Part 2 - mud cracks (above),...

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The first chordates and vertebrates are from the Cambrian Pikaia , a cephalochordate from the Cambrian Burgess Shale www.emc.maricopa.edu/faculty/farabee/biobk/fpikaia.gif Reconstruction of Pikaia www.3d-art.co.uk/3dpages/3ded/edimages/pikaia.jpg Reconstruction of Myllokungmingia, a vertebrate www.sciencenews.org/pages/sn_arc99/11_6_99/fob1.jpg Myllokungmingia www.trilobita.de/evolution/urfisch.gif
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The first land-going animals from latest Cambrian or Early Ordovician Climactichnites wilsoni , fossil trackways made by mollusks. Specimens from Wisconsin and Quebec and are associated with
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Unformatted text preview: mud cracks (above), adhesion structures (above right), and raindrop impressions (right) Arthropod trackways in beach dune sands! Protichnites and Diplichnites trackways Ontario, Canada from MacNaughton et al. (2002) Apakura machu, above, and marine trackways of a similar Arthropod, Argentina From Vaccari et al. (2004) Ordovician Period upload.wikimedia.org/wikipedia/commons/5/5b/Ordovician_Sea.jpg Jawless fish abundant- often found as isolated scales Earliest land plants based on spores...
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This note was uploaded on 04/22/2008 for the course GEOL 111 taught by Professor Getty during the Fall '07 term at UConn.

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Life Before the Dinosaurs Part 2 - mud cracks (above),...

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