References / paperNew U-Pb constraints and geochemistry of the East Kirkton Quarry, Scotland: Implications for early tetrapod evolution in the Carboniferous
Garza, H.K.; Catlos, E.J.; Lapen, T.J.; Clarke, J.A.; Brookfield, M.E.
Year2025
Source roleprimary-study
DOI / ID10.1371/journal.pone.0321714
Fitness and scope
range · geochronology · methods
Detrital-zircon LA-ICP-MS study reporting a 341 ± 3 Ma maximum depositional age for East Kirkton Unit 82; an MDA is an upper age constraint and not a direct date on Balanerpeton.
Claim ledger
fossil-range · mediumThe 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