This taxon is considered nomen dubium, species not entered
of the valid taxon Placodontia
according to the Paleobiology Database.
See the page for Placodontia →
Bibliography
Original description
H.-V. Karl. 2005. The homology of supramarginals in turtles (Reptilia: Chelonii). Studia Geologica Salmanticensia 41:63-75