fossil
Fenestella Bryozoan Fossil
Fenestella (class Stenolaemata)
Lacy or fan-like appearance with tiny pores (fenestrules); usually preserved in limestone or shale; hardness relates to the host rock (3-4); dull luster; typically gray or tan.
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Physical properties
Lacy or fan-like appearance with tiny pores (fenestrules); usually preserved in limestone or shale; hardness relates to the host rock (3-4); dull luster; typically gray or tan.
Formation & geological history
Formed in marine environments during the Paleozoic era (approx. 488-251 million years ago); bryozoans were colonial organisms that filtered food from water.
Uses & applications
Used primarily for scientific study, as index fossils for dating rock layers, and as collector specimens.
Geological facts
Fenestella bryozoans are often called 'lace corals' due to their appearance, though they are biologically unrelated to modern corals; they were dominant reef builders in the Carboniferous period.
Field identification & locations
Identify in the field by looking for delicate, net-like or screen-like textures on the surface of sedimentary rocks. Common in limestone outcrops worldwide.
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