Graptolites
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Scan day: 17 February 2014 UTC
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Description: Photograph of several specimens of Monograptus colonus, one being magnified, from Silurian deposits at Ludlow, UK.
Graptolites are strange little creatures that flourished during the Palaeozoic. They get their name from looking like writing in the rock. They appear to have evolved backward: The earliest are complex nets with many branches (stipes) and crosslinks. As time passes the complexity decreases until the last examples are just single stipe.
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