More brachiopods! The spiral lophophores are a filtering apparatus.
Image 1: Brachiopod, (image source)
Image 2: Magellania, an articulate brachiopod (source)
Image 3: Group of brachiopods. (Source). The coolest one is “E”:
Notosaria nigricans E. Brachial interior with spirolophous lophophore
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