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Fenestrata

Extinct order of moss animals From Wikipedia, the free encyclopedia

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Fenestrata is an extinct order of bryozoan, dating from the Upper Arenig.[1] Most fenestrate bryozoans formed net-like colonies, often in funnel- or fan-shaped forms, with a single layer of zooids facing one direction.[2] The colony shape served as a filter-feeding apparatus that water currents flowed through, with autozooecial apertures only on the side of the colony facing into the current.[3] This colony structure was vulnerable to predators, so some fenestrate bryozoans produced skeletal superstructures, likely to strengthen or protect the colony, and others had protective spines surrounding their autozooecial apertures.

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Some sources consider Fenestrata to be a synonym of Fenestrida,[4] while others treat them as separate orders.[5]

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