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