Reptilia indet. Dating uncertain – Upper Röt or Lower Muschelkalk (Anisian) Upper Silesia, Poland The specimen is the lateral gastralium (ventral rib) of an indeterminate reptile. Gastralia were present in almost all Triassic marine reptiles (the exception being Ichthyosauria). Their morphology is very similar, making such specimens non-diagnostic. The specimen is approximately 56 mm long and…