Dinopedia
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Acrothyra is a brachiopod from middle Cambrian. It was from the Burgess Shale and compromised about 0.5% of the ecological community there. Some species also lived in Russia and possibly Europe.

Acrothyra-turntable

Acrothyra was tiny, with specimens only reaching 2 millimeters. Acrothyra lived in clusters, and had a lophophore, allowing them to filter feed from the water, typical of brachiopods.

References[]

https://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=17&m=2&&ref=i

https://en.m.wikipedia.org/wiki/Acrothyra

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