Tokummia katalepsis was recovered as a stem mandibulate in the cited morphology matrix; this is not direct ancestry to crustaceans, insects or myriapods.
claim:taxon:tokummia:taxonomyTokummia katalepsis
Holotype ROM 63823 and paratypes preserve mandibles, maxillipeds and subdivided basipods used to test a stem-mandibulate body plan.
Represented range508–508 Ma
Content packagecrustaceans-insects
PBDBtxn:473103
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
The profile is restricted to Marble Canyon Burgess Shale material and does not establish a global range.
claim:taxon:tokummia:biogeographyMandibles and appendages support feeding and locomotor hypotheses, while prey, habitual substrate use and performance were not observed.
claim:taxon:tokummia:ecologyROM 63823 and paratypes preserve paired mandibles, maxillipeds and subdivided basipods.
claim:taxon:tokummia:morphologyThe 508 Ma display point is a locality sample age, not a global species range or mandibulate origin date.
claim:taxon:tokummia:fossil-rangeKnown limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
References
- Burgess Shale fossils illustrate the origin of the mandibulate body planAria, C.; Caron, J.-B. · 2017 · DOI 10.1038/nature22080
- 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