Catalog / superclass

Gymnospermae

The Gymnospermae atlas root uses a rounded 365–0 Ma total-seed-plant navigation envelope, anchored by Famennian cupulate seeds and living gymnosperm families; it is not the fossil first appearance or crown age of extant Gymnospermae. This navigation entry is not a phylogeny or a complete taxon dossier.

Represented range365–Present Ma

Content packagegymnosperms

PBDBNot linked

Evidence boundary

Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.

Claim ledger

fossil-range · medium

claim:taxon:gymnospermae:root-range-rc39

Known limits

A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
PBDB external identifier withheld: accepted-rank-mismatch.

References

The earliest seedsGillespie, W.H.; Rothwell, G.W.; Scheckler, S.E. · 1981 · DOI 10.1038/293462a0
Phylogenomics resolves the deep phylogeny of seed plants and indicates partial convergent or homoplastic evolution between Gnetales and angiospermsRan, J.-H.; Shen, T.-T.; Wang, M.-M.; Wang, X.-Q. · 2018 · DOI 10.1098/rspb.2018.1012
Open Tree of Life web servicesOpenTreeOfLife Project
The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39

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