A drawing of the 3-lobed larval phase of "Argyrotheca cordata", 180μm, lateral view, top apical lobe with long ciliae, mid-section mantel lobe, with ventral ciliae (left) and 4 bundles of setae (2 visible), brachial lobe, without ciliae. Based on: Andreas Altenburger and Andreas Wanninger (2009). "Comparative larval myogenesis and adult myoanatomy of the rhynchonelliform (articulate) brachiopods Argyrotheca cordata, A. cistellula, and Terebratalia transversa". Frontiers in Zoology , 6:3 doi:10.1186/1742-9994-6-3, figure 1f.