Graptolite fossil - Tetragraptus fruticosis

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Tetragraptus fruticosis, a graptolite fossil from the Lower Ordivician, Australia. Graptolites are an extinct class of animals in the Hemichordata phylum. The fossils represent the skeletal sheath of a colonial, soft-bodied marine invertebrate which was free-floating. They are an important index fossil for dating rocks from the Paleozoic Era.
Tetragraptus fruticosis, a graptolite fossil from the Lower Ordivician, Australia. Graptolites are an extinct class of animals in the Hemichordata phylum. The fossils represent the skeletal sheath of a colonial, soft-bodied marine invertebrate which was free-floating. They are an important index fossil for dating rocks from the Paleozoic Era.
Filename: Graptolite-Tetragraptus_fruticosis.jpg
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