An integrated conch-character analysis resolves relationships within sampled Hildoceratidae; this family-level result supplies an Ammonitida case study rather than an order-wide tree or range.
claim:taxon:ammonitidaAmmonitida
An integrated conch-character analysis resolves relationships within sampled Hildoceratidae; this family-level result supplies an Ammonitida case study rather than an order-wide tree or range. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range201.4–174.7 Ma
Content packagemolluscs-brachiopods
PBDBtxn:84931
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
Bardin et al. analyze a 105-taxon Early Jurassic Hildoceratidae matrix, supporting a 201.4–174.7 Ma period envelope for that sampled ammonitid family rather than the complete Ammonitida range or a Cretaceous extinction endpoint.
claim:taxon:ammonitida:source-bounded-range-rc50Known limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
References
- The phylogeny of Hildoceratidae (Cephalopoda, Ammonitida) resolved by an integrated coding scheme of the conchBardin, J.; Rouget, I.; Cecca, F. · 2017 · DOI 10.1111/cla.12151
- 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