Catalog / order

Squamata

The Squamata route follows a molecular supermatrix classification of 4,161 sampled living lizard and snake species; it is an extant topology hypothesis and does not establish a fossil first appearance, ancestral species or exact divergence date. This navigation entry is not a phylogeny or a complete taxon dossier.

Represented range0–Present Ma

Content packageturtles-lepidosaurs

PBDBNot linked

Evidence boundary

Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.

Claim ledger

topology · medium

claim:taxon:squamata

fossil-range · low

Megachirella provides a Middle Triassic Pan-Squamata stem sample, not a crown-Squamata first appearance; the former 201.4 Ma–present crown display is therefore withheld.

claim:taxon:squamata:range-boundary

Known 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.
PBDB mapping requires concept review because the pinned lineage is incompatible with the local expected parent Pan-Squamata.

References

The origin of squamates revealed by a Middle Triassic lizard from the Italian AlpsSimões, T.R.; Caldwell, M.W.; Tałanda, M.; et al. · 2018 · DOI 10.1038/s41586-018-0093-3
Open Tree of Life web servicesOpenTreeOfLife Project
The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39
A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakesPyron, R.A.; Burbrink, F.T.; Wiens, J.J. · 2013 · DOI 10.1186/1471-2148-13-93

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