Triadobatrachus massinoti, the earliest known lissamphibian (Vertebrata: Tetrapoda) re-examined by μCT scan, and the evolution of trunk length in batrachians

μCT of the unique split-nodule holotype MNHN.F.MAE.126 reveals a stem-salientian body with fifteen presacrals, caudal vertebrae and possible mentomeckelians; it records an early frog-lineage mosaic, not crown Anura or specialized jumping.

Triadobatrachus massinoti is known from the unique holotype MNHN.F.MAE.126 and is treated as a stem salientian, not crown Anura.

MNHN.F.MAE.126 comes from Sakamena-equivalent beds near Betsiaka, Madagascar; historical provenance limits finer geographic inference.

The skeleton does not directly establish diet or habitat preference, and its retained tail and long trunk do not support specialized frog-like jumping.

Micro-CT of MNHN.F.MAE.126 reveals fifteen presacrals, retained caudal vertebrae and possible mentomeckelian elements in a stem-salientian body.

The displayed 251.902–247 Ma interval is a broad Early Triassic envelope for MNHN.F.MAE.126 and is not a crown-frog FAD.

The Amphibian fossil evidence route navigation entity is source-linked only to the named specimen, dataset and analysis dossiers already cited by its range ledger. Its displayed span is a study-bounded route or sample envelope, not a biological taxon, ancestor sequence, global FAD/LAD or exact origin interval.