Finally, some Priosphenodon post crania!

Earlier we looked at the skull of Priosphenodon (aka Kaikaifilusaurus) No dorsal or occipital views, but plenty of data to nest it at the base of the rhynchosaurs, despite its identification as a rhynchocephalian (sphenodontian).

Now (Fig. 1), courtesy of Dr. Sebastián Apesteguía (Argentina), who wrote his thesis on Priosphenodon, an image of the skeleton as a museum model is available. I understand that the carpals are among the few imagined parts here.

Figure 1. Priosphenodon model. This is the first data I've seen on the dorsal skull and postcrania. Photo courtesy of Dr. Apesteguía.

Figure 1. Priosphenodon model. This is the first data I’ve seen on the dorsal skull and postcrania. Photo courtesy of Dr. Apesteguía. Inset shows that the foot and manus of the model were switched based on comparisons to Hyperodapedon, a related rhynchosaur. The artist was unsupervised.

You’ll note
the wide, bulging cheeks and extremely narrow parietal (skull roof), as in rhynchosaurs. The nares had not become confluent. That comes in more highly derived forms. But look at those twin anterior dentary tips, as in rhynchosaurs. No anterior process on the ilium though. Stance probably not as sprawling as this, and not as erect as in rhyncosaurs.

References
Photo courtesy of Dr. Sebastian Apesteguía Specimen model at the new museum of Cipolletti (Rio Negro Province, Argentina), currently under construction. The sculptor is Jorge Antonio Gonzalez.

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