Trilobite primary-evidence samples

The trilobite evidence-samples entity is a navigation group linking the early-trilobite morphology matrix and approximately 521 Ma widespread sampled record to specimen dossiers. It is not a taxon, direct ancestor route, Precambrian absence test, global FAD or complete Trilobita range. This navigation entry is not a phylogeny or a complete taxon dossier.

Represented range521–443 Ma

Content packagetrilobites-chelicerates

PBDBNot linked

Evidence boundary

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

Claim ledger

topology · medium

claim:taxon:trilobite-evidence-samples

fossil-range · medium

The 521–443 Ma trilobite evidence route is a navigation envelope between separate early-trilobite and Beecher's Bed samples, not a lineage duration or continuous occurrence series.

claim:taxon:trilobite-evidence-samples:fossil-range

Known limits

A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
PBDB external identifier withheld: no-exact-name-in-snapshot.

References

Reassessing a cryptic history of early trilobite evolutionHolmes, J.D.; Budd, G.E. · 2022 · DOI 10.1038/s42003-022-04146-6
The trilobite upper limb branch is a well-developed gillHou, J.-B.; Hughes, N.C.; Hopkins, M.J. · 2021 · DOI 10.1126/sciadv.abe7377
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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