The Pleurodira display route borrows the 155.6 Ma Caribemys-based hard minimum for crown Testudines as a conservative navigation boundary; that calibration is not a Pleurodira origin date, direct ancestor or audited global first appearance. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range0–Present Ma
Content packageturtles-lepidosaurs
PBDBtxn:37589
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
fossil-range · low
The Pleurodira display route borrows the 155.6 Ma Caribemys-based hard minimum for crown Testudines as a conservative navigation boundary; that calibration is not a Pleurodira origin date, direct ancestor or audited global first appearance.
claim:taxon:pleurodirafossil-range · low
The cited 155.6 Ma Caribemys minimum constrains crown Testudines rather than Pleurodira specifically, so the former Pleurodira range is withheld pending a node-specific fossil calibration.
claim:taxon:pleurodira:range-boundary
Known limits
A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.