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Graptolites and early vascular land plants.
URL: http://microfossils.graptolite.net/tracheids.html
Submitted: Sat Sep 06 2003
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CT: Earth Sciences: Paleontology: Invertebrates: Graptolites: Graptolites and early vascular land plants.
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Description:
Early Palaeozoic tracheid-like tubes, believed to be of vascular land plant origin, resemble fragments of graptolite stolons.