Cyclostomatida

Rarity: Common

The most frequent rarity: most Wikipedia articles become Commons.

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At a glance

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Domain

Nature

Knowledge cost

2

Influence

2

Resistance

4

In collections

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What Wikipedia says

Cyclostomatida, or cyclostomata (also known as cyclostomes), are an ancient order of stenolaemate bryozoans which first appeared in the Lower Ordovician. It consists of 7+ suborders, 59+ families, 373+ genera, and 666+ species. The cyclostome bryozoans were dominant in the Mesozoic; since that era, they have decreased.

Excerpt from the Wikipedia article “Cyclostomatida”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: http://www.civgeo.rmit.edu.au/bryozoa/cyclostomata/crisinidae/mesorad.html, Public domain, via Wikimedia Commons.