Mitochondrial sequences from 595 sampled species provide a broad explicit estimate of living elasmobranch relationships. The mitochondrial tree does not define the total fossil range, exact crown age or global origin of Elasmobranchii. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range281–Present Ma
Content packagechondrichthyes
PBDBNot linked
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
topology · medium
Mitochondrial sequences from 595 sampled species provide a broad explicit estimate of living elasmobranch relationships. The mitochondrial tree does not define the total fossil range, exact crown age or global origin of Elasmobranchii.
claim:taxon:elasmobranchiidivergence-time · low
A calibrated mitogenomic analysis estimated the shark–ray split near 281 Ma, supporting a model-dependent 281 Ma–present window for modern elasmobranch lineages, not a total-group fossil FAD.
claim:taxon:elasmobranchii:range-boundary
Known limits
A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.