A systematic synthesis recognizes Cetacea from a sequence of separately sampled Eocene fossils and living lineages, but explicitly combines paleontological, anatomical, stratigraphic and molecular evidence rather than documenting one continuous population or exact origination event. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range53–Present Ma
Content packagecetartiodactyla
PBDBtxn:36652
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
taxonomy · medium
A systematic synthesis recognizes Cetacea from a sequence of separately sampled Eocene fossils and living lineages, but explicitly combines paleontological, anatomical, stratigraphic and molecular evidence rather than documenting one continuous population or exact origination event.
claim:taxon:cetacea:sampled-recordfossil-range · medium
Cetacea is displayed at 53–0 Ma only as a review-bounded fossil-to-living navigation envelope, not an exact cetacean origination date. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:cetacea:source-bounded-range-rc49
Known limits
A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.