Surprisingly the holotype specimen, which consists solely of armor, has never been completely described. Just as strange, even though the Petrified Forest specimen was not considered to be the same taxon as the German material by Robert Long and Karen Ballew, the species name given to the German material (collected in the 1800s and originally believed to be a phytosaur) was named for Chris Andress (the chief ranger at Petrified Forest) and his family (Long and Ballew, 1985).
Thanks to Dave Hone who sent me his photos of the Paratypothorax mount and secured permission to post the photos.
REFERENCES
Hunt, A.P. and S.G. Lucas. 1992. The first occurrence of the aetosaur Paratypothorax andressi (Reptilia, Aetosauria) in the western United States and its biochronological significance. Paläontologische Zeitschrift 66:147-157. DOI:10.1007/BF02989485.
Long, R. A., and K. L. Ballew. 1985. Aetosaur dermal armor from the late Triassic of southwestern North America, with special reference to material from the Chinle Formation of Petrified Forest National Park. Museum of Northern Arizona Bulletin 47:45-68.
Long, R. A., and P. A. Murry. 1995. Late Triassic (Carnian and Norian) tetrapods from the southwestern United States. New Mexico Museum of Natural History and Science Bulletin 4:1-254.
Lucas, S.G., Heckert, A.B., and L.F. Rinehart. 2006. The Triassic aetosaur Paratypothorax. New Mexico Museum of Natural History and Science Bulletin 37:575-580
Parker, W. G. 2007. Reassessment of the aetosaur “Desmatosuchus” chamaensis with a reanalysis of the phylogeny of the Aetosauria (Archosauria: Pseudosuchia). Journal of Systematic Palaeontology 5:41–68.
I actually have no idea how removable the osteoderms are - they were not mounted at the time of my visit.
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