The broad Amphibia navigation envelope uses the East Kirkton Balanerpeton sample and its 341 ± 3 Ma detrital-zircon maximum depositional-age constraint as the older evidence anchor and living amphibians at 0 Ma as the younger edge; the MDA is not a direct fossil date, global FAD, crown-Lissamphibia age or direct-ancestor claim. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range341–Present Ma
Content packageamphibia
PBDBtxn:36319
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
fossil-range · medium
The broad Amphibia navigation envelope uses the East Kirkton Balanerpeton sample and its 341 ± 3 Ma detrital-zircon maximum depositional-age constraint as the older evidence anchor and living amphibians at 0 Ma as the younger edge; the MDA is not a direct fossil date, global FAD, crown-Lissamphibia age or direct-ancestor claim.
claim:taxon:amphibia:fossil-range
Known limits
A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.