Silurian

Related Terms:

placoderm pridoli llandovery acanthodian period ludlow homerian eophyte geologic wenlock paleozoic era banded tube rhynchonella rhuddanian stromatoporoid epoch silures

Definitions:

Noun

Silurian Silurian period

Definition: from 425 million to 405 million years ago; first air-breathing animals

Adjective

Definition: Of a geologic period within the Paleozoic era; comprises the Llandovery, Wenlock, Ludlow and Pridoli epochs from about 439 to 409 million years ago.

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