Saurischia is represented by the sampled early-dinosaur matrix that places Tawa within Saurischia; the result is a phylogenetic hypothesis and does not make Tawa a direct ancestor or establish an exact clade range.
claim:taxon:saurischiaSaurischia
Saurischia is represented by the sampled early-dinosaur matrix that places Tawa within Saurischia; the result is a phylogenetic hypothesis and does not make Tawa a direct ancestor or establish an exact clade range. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range215–213 Ma
Content packagedinosauria
PBDBNot linked
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
Saurischia is displayed at 215–213 Ma only as the dated Late Triassic Tawa-bearing interval used in the sampled saurischian analysis, not a Saurischia origin date. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:saurischia:source-bounded-range-rc49Known limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
- PBDB external identifier withheld: accepted-rank-mismatch.
References
- A Complete Skeleton of a Late Triassic Saurischian and the Early Evolution of DinosaursNesbitt, S.J.; Smith, N.D.; Irmis, R.B.; Turner, A.H.; Downs, A.; Norell, M.A. · 2009 · DOI 10.1126/science.1180350
- 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