Early internal-shell characters are used to infer relationships near the origin of sampled Ceratitida; this comparative inference is not a directly observed ancestor or a complete global first appearance.
claim:taxon:ceratitidaCeratitida
Early internal-shell characters are used to infer relationships near the origin of sampled Ceratitida; this comparative inference is not a directly observed ancestor or a complete global first appearance. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range298.9–201.4 Ma
Content packagemolluscs-brachiopods
PBDBtxn:14000
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
Shigeta et al. explicitly state that Ceratitida ranged from the Early Permian to the end of the Triassic; the atlas converts those named period bounds to 298.9–201.4 Ma with ICS v2026/06 without implying direct dates, continuous preservation or ancestry.
claim:taxon:ceratitida:source-bounded-range-rc50Known limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
References
- Origin of the Ceratitida (Ammonoidea) inferred from the early internal shell featuresShigeta, Y.; Zakharov, Y.D.; Mapes, R.H. · 2001 · DOI 10.2517/prpsj.5.201
- International Chronostratigraphic Chart v2026/06Cohen, K.M.; Harper, D.A.T.; Gibbard, P.L.; Car, N. · 2026 · DOI 10.18814/epiiugs/2025/025001
- 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