
Supplementary Data 1. Specimens of Castaneametra hodgesi, Decameros wertheimi, Semiometra klari, Semiometra alveoradiata, along with their locality numbers. Supplementary Data 2. Latitudes, longitudes, and descriptions for all localities. Supplementary Data 3. Measurements of Castaneametra hodgesi, used in main text Fig. 8. Movie S1. Movie showing reconstructed computed tomographic scan of Castaneametra hodgesi holotype (NPL 93001), rendering plane perpendicular to oral-aboral axis. Note geopetal structures in radial pits. Movie S2. Reconstructed computed tomographic scan of Castaneametra hodgesi holotype (NPL 93001), rendering plane parallel to oral-aboral axis. Movie S3. Reconstructed computed tomographic scan of Castaneametra hodgesi paratype (NPL 103166), rendering plane perpendicular to oral-aboral axis. Movie S4. Reconstructed computed tomographic scan of Castaneametra hodgesi paratype (NPL 103166), rendering plane parallel to oral-aboral axis. Aboral end at top of picture.
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