Supplementary Figure 1 from A possible case of inverted lifestyle in a new bivalved arthropod from the Burgess Shale

Three-dimensional internal structures and comparisons with other arthropods from the Burgess Shale. A) Odaraia, lateral view ROMIP 61121. Odaraia was also referred as an invert swimmer and suspension feeder and shares multiple traits with Fibulacaris nereidis, including the absence of developed antennae and a highly multisegmented body. B, C) F. nereidis, ROMIP 65363, focus on the indeterminate rostrum tissue. D) Elemental maps of F. nereidis, ROMIP 65363: aluminium, carbon, calcium, phosphorous. E) Elemental maps of Marrella splendens ROMIP 60748: carbon, phosphorous. The tissue seen in the cephalic spines of M. splendens could represent cavities or unrecognised organs (79), and may have been similar to the internal tissue on the rostrum of F. nereidis. Abbreviations: ca) carapace, ey) eye, gu) gut, in?) indeterminate, le) legs, ro) rostrum. Scale bars: 10 mm (A), 2 mm (B), 1 mm (C, D, E).