More brachiopods! The spiral lophophores are a filtering apparatus. 

Image 1: Liospiriferina rostrata (jr synonym Spiriferina rostrata) (Brachiopod). Brachiopods filtered plankton, using a specialized organ: the lophophore. It is exceptional to be able to find silicified skeleton of this organ, visible in this specimen.” via Wikipedia (image source) cc-by-sa

Image 2: Spiriferina brachiopod fossil. Science Photo Library

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