This PDF file includes:

• Supplementary Text
  
• fig. S1. Field view of the upper part of the Lower Shale unit containing the Paris Biota.
  
• fig. S2. Log section of the main Paris Biota exposure.
  
• fig. S3. Taxa of the Paris Biota showing unexpected or extended temporal distributions, new Early Triassic spatiotemporal occurrences, new oldest records of derived characters for the clade, and new ecologic or trophic interactions.
  
• fig. S4. Artistic reconstruction of the Paris Biota.
  
• fig. S5. Closeup view of an apex of a leptomitid protomonaxonid sponge.
  
• fig. S6. Closeup views of twisted apex of two leptomitid protomonaxonid sponges.
  
• fig. S7. Closeup views of longitudinal and transverse spicules of four leptomitid protomonaxonid sponges.
  
• figs. S8 to S10. Leptomitid protomonaxonid sponges from the Paris Biota.
  
• fig. S11. Leptomitid protomonaxonid sponge from the Paris Biota showing attachment to a shell fragment.
  
• fig. S12. Linguloid and discinoid inarticulate brachiopods.
  
• fig. S13. Sponge specimen showing minute epizoan brachiopods and closeup views of epizoan brachiopods.
  
• fig. S14. Bivalve specimens.
  
• fig. S15. Ammonoid and nautiloid specimens.
  
• fig. S16. Belemnoid arm hooks.
  
• fig. S17. Gladius-bearing coleoid.
  
• fig. S18. Different types of preservation for crustaceans from the Paris Biota.
  
• fig. S19. Penaeidean and caridean shrimps and accumulations.
  
• fig. S20. Penaeid shrimps, caridean shrimp, and litogastrid lobsters.
  
• fig. S21. Thylacocephalan specimens.
  
• fig. S22. Holocrinid specimens.
  
• fig. S23. Closeup view of a crinoid stem with cirri and closeup view of an isolated pinnulate arm.
  
• fig. S24. Ophiuroid specimens.
  
• fig. S25. Closeup view of the spine articulations of an ophiuroid specimen.
  
• fig. S26. Vertebrate remains from the Paris Biota.
  
• fig. S27. Coprolites from the Paris Biota.
  
• fig. S28. Algal morphotypes from the Paris Biota.
  
• figs. S29 and S30. SEM photographs and EDS analyses for leptomitid protomonaxonid sponge specimens.
  
• fig. S31. SEM photograph and EDS analysis for a crustacean specimen.
  
• fig. S32. SEM photograph and EDS analysis for a belemnoid hook specimen.
  
• fig. S33. SEM photograph and EDS analyses for a leptomitid protomonaxonid sponge specimen.
• table S1. Sampled taxa from the Paris Biota.
  
• References (64–134)

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