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Cryptovaranoides remains a competing-topology case

The same holotype and disputed referred bones have produced incompatible crown-squamate and non-squamate placements, making character identity and specimen referral part of the evidence itself.

Represented range205.7–201.4 Ma
RegionsSlickstones Quarry fissure fill, Gloucestershire, England; competing morphology matrices
CladesNeodiapsida · Pan-Squamata · Cryptovaranoides microlanius

Claim ledger

topology · contested

Cryptovaranoides holotype NHMUK PV R36822 and disputed referred bones currently support incompatible published placements because element identity, referral and character scoring differ; this package does not treat the taxon as a secure crown-squamate first appearance.

claim:event:cryptovaranoides-competing-topologies

References

  1. A Triassic crown squamateWhiteside, D.I.; Chambi-Trowell, S.A.V.; Benton, M.J. · 2022 · DOI 10.1126/sciadv.abq8274
  2. The affinities of the Late Triassic Cryptovaranoides and the age of crown squamatesBrownstein, C.D.; Simões, T.R.; Caldwell, M.W.; Lee, M.S.Y.; Meyer, D.L.; Scarpetta, S.G. · 2023 · DOI 10.1098/rsos.230968
  3. Late Triassic Cryptovaranoides microlanius is a squamate, not an archosauromorphWhiteside, D.I.; Chambi-Trowell, S.A.V.; Benton, M.J. · 2024 · DOI 10.1098/rsos.231874
  4. Cryptovaranoides is not a squamateCaldwell, M.W.; Brownstein, C.D.; Meyer, D.L.; Scarpetta, S.G.; Lee, M.S.Y.; Simões, T.R. · 2025 · DOI 10.7554/eLife.107021
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