The Arthropoda root display replaces the unsupported 540 Ma value with a 521–0 Ma sampled navigation envelope anchored by widespread trilobites, a contained arthropod clade, and living arthropods; it does not date the origin of Arthropoda. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range521–Present Ma
Content packagecrustaceans-insects
PBDBtxn:18891
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 Arthropoda root display replaces the unsupported 540 Ma value with a 521–0 Ma sampled navigation envelope anchored by widespread trilobites, a contained arthropod clade, and living arthropods; it does not date the origin of Arthropoda.
claim:taxon:arthropoda:root-range-rc39
Known limits
A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.