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GRAPTOLITES

Graptolites (Subphylum Hemichordata) are extinct marine organisms.

Mode of life: Colonial mostly planktonic.

Morphology: one or more linked stipes with rows of thecae which were occupied by
simple animals called zooids.

Add a scale and the following labels to the graptolite below: Stipe
Thecae
Nema



Eg Didymograptus
(Ordovician)















Graptolites…

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shales forming in low energy conditions, both in shallow shelf seas and deep marine
basins.

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