Silurian

2 articles

Graptolites: The Colonial Architects of the Paleozoic Oceans

Graptolites: The Colonial Architects of the Paleozoic Oceans Graptolites are a fascinating group of colonial animals that once dominated the marine ecosystems of the early Paleozoic era. ...

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Anaspida: The Shieldless Jawless Fish of the Paleozoic

Anaspida: The Shieldless Jawless Fish of the Paleozoic In the ancient oceans of the Paleozoic era, a unique group of vertebrates navigated the waters without the heavy armor typical of th...

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