Gymnophiona

The approximately 25 Ma holotype of Ymboirana acrux was assigned to the living family Typhlonectidae by comparative anatomy, provisionally supporting a crown-Gymnophiona fossil record while formal phylogenetic testing and unambiguous family synapomorphies remain unavailable. This navigation entry is not a phylogeny or a complete taxon dossier.

Represented range25–Present Ma

Content packageamphibia

PBDBNot linked

Evidence boundary

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

Claim ledger

fossil-range · low

claim:taxon:gymnophiona:provisional-crown-record

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.

References

The first fossil record of an aquatic caecilian (Gymnophiona: Typhlonectidae)Santos, R.O.; Wilkinson, M.; Ribeiro, G.C.; Carvalho, A.B.; Zaher, H. · 2024 · DOI 10.1093/zoolinnean/zlad188
Open Tree of Life web servicesOpenTreeOfLife Project
The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39

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