Science Advances

Supplementary Materials

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  • Fig. S1. Supporting image to Fig. 1, showing the heavily calcified thallus portion of this specimen of Lithophyllum kotschyanum (Sesoko-jima, Japan).
  • Fig. S2. Primary and secondary crystallization of Porolithon gardineri (Safaga, Egypt).
  • Fig. S3. Morphological overviews of L. kotschyanum (Safaga, Egypt), Lithophyllum pygmaeum (Dubai, United Arab Emirates), Titanoderma byssoides (Gavdos, Greece), and S. yendoi (Sesoko-jima, Japan).
  • Fig. S4. Morphological overviews of Porolithon okodes (Safaga, Egypt), P. gardineri (Safaga, Egypt), and Hydrolithon reinboldii (Hawaii, USA).
  • Fig. S5. Morphological overviews of Neogoniolithon strictum (Florida, USA), Neogoniolithon fosliei (Safaga, Egypt), and Mastophora rosea (Guam).
  • Fig. S6. Morphological overviews of Lithothamnion glaciale (Rebbenesøya, Norway) and Phymatolithon sp.
  • Fig. S7. Plate showing the SW structure and exposed primary layers deeper in the coralline algal thallus of L. kotschyanum (Safaga, Egypt), L. pygmaeum (Guam), T. byssoides (Gavdos, Greece), Porolithon onkodes (Safaga, Egypt), Porolithon gardineri (Safaga, Egypt), H. reinboldii (Dubai, United Arab Emirates), and S. yendoi (Sesoko-jima, Japan).
  • Fig. S8. Plate showing the SW structure and exposed primary layers deeper in the coralline algal thallus of L. glaciale (Rebbenesøya, Norway), Phymatholithon sp. (Rebbenesøya, Norway), Sporolithon ptychoides (Safaga, Egypt), N. strictum (Rodriguez Key, Florida, USA), N. fosliei (Safaga, Egypt), and M. rosea (Guam).
  • Fig. S9. SEM image showing details of the PW crystallites present on the topmost epithallial cell row of the major CRA clades as shown in Fig. 5.
  • Table S1. List of the analyzed samples with the corresponding locations where the specimens were collected.
  • Table S2. Binary matrix of morphological criteria assigned for each taxon.
  • References (5961)

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