Ginkgoxylon liaoningense is used as a Ginkgo-like wood exemplar within Ginkgophyta context; it is not assigned as a direct ancestor of Ginkgo biloba.
claim:taxon:ginkgophyta:taxonomyGinkgophyta
Ginkgoxylon liaoningense PB22285 provides a well-bounded Jurassic wood-anatomy exemplar without being treated as the first ginkgophyte or an associated leaf species.
Represented range165–Present Ma
Content packagegymnosperms
PBDBtxn:56140
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
PB22285 comes from the Tiaojishan Formation of western Liaoning and does not establish the full Jurassic or phylum-wide distribution.
claim:taxon:ginkgophyta:biogeographyWood anatomy supports a terrestrial woody growth form, while precise habitat, physiology and community role are inferred rather than observed.
claim:taxon:ginkgophyta:ecologyPB22285 preserves a suite of secondary-xylem characters used to diagnose Ginkgoxylon liaoningense.
claim:taxon:ginkgophyta:morphologyGinkgophyta is displayed at 165–0 Ma only as a dated Ginkgoxylon-sample-to-living navigation anthology: the 153–165 Ma wood specimen is not the phylum FAD, an unbroken species lineage or a direct ancestor of living Ginkgo.
claim:taxon:ginkgophyta:fossil-rangeKnown limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
- PBDB mapping requires concept review because the pinned lineage is incompatible with the local expected parent Gymnospermae.
References
- A Jurassic wood providing insights into the earliest step in Ginkgo wood evolutionJiang, Z.; Wang, Y.; Philippe, M.; Zhang, W.; Tian, N.; Zheng, S. · 2016 · DOI 10.1038/srep38191
- Open Tree of Life web servicesOpenTreeOfLife Project
- The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39
- Denormalized occurrence and taxon tables of the Paleobiology DatabaseThe Paleobiology Database Community; Kocsis, Á.T. · 2026 · DOI 10.5281/zenodo.21620933
- 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