Edingerella madagascarensis
Early Triassic
Isalo Formation
Ambilobe, Madagascar

Highly unusual 95mm skull in paired concretion. The skull is an external mold of the skull – the bones dissolved away leaving an exact copy of the skull in the concretion! Very strange preservation. Only one we have ever had. Rare.

An excellent paper exists on a near identical find. See:
An exquisite specimen of Edingerella madagascariensis (Temnospondyli) from the Lower Triassic of NW Madagascar