Ordovician Hemichordata Fossils
The graptoloids were colonial animals with many miniscule individual
living tubes (thecae) grouped together into a colony called a rhabdosome.
The rhabdosome often resembles a jigsaw blade. When living, the
rhabdosome was suspended from a float by a slender thread called a nema.
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Class:Graptolithina
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Genus/species:
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unknown graptolite
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Images
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Notes:
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largest graptolite rhabdosome is near the bottom and is about 8.3 mm
across.
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