In Depth
Even though it was discovered in 1990, Protenodontosaurus is still a little known placodont. It has been suggested that Protenodontosaurus is a missing link between the placodonts Placochelys and Cyamodus, or at very least representative of the form that would be expected to exist between them.
Further Reading
– A skull of Cyamodus kuhnschnyderi Nosotti & Pinna 1993, from the Muschelkalk of Wassonne (Alsace, France) – Palaeontologische Zeitschrift 73(3/4):377-383 – O. Rieppel & H. Hagdorn – 1999. – The cranial anatomy of Placochelys placodonta Jaekel, 1902, and a review of the Cyamodontoidea (Reptilia, Placodonta) – Fieldiana: Geology, new series 45:1-104 – O. Rieppel – 2001.