Rhomboteuthis lehmani explained

Rhomboteuthis lehmani is an extinct species of squid, currently the only described member of its genus. R. lehmani is known from the Lower Callovian (165–164 Ma) of Voulte-sur-Rhône, Ardèche, France.

Radiography was used to locate the position of the ink sac and gladius (pen) of the pictured specimen.

References

• Fischer, J.-C. & B. Riou 1982. Les teuthoïdes (Cephalopoda, Dibranchiata) du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France). Annales de Paléontologie 68(4): 295–325.
• Fischer, J.-C. 2003. Invertébrés remarquables du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France). Annales de Paléontologie 89: 223–252.