The real Proterochampsa

Drawings are great.
Reig (1959) gave us a drawing of Proterochampsa (Fig. 1), and it was good enough to nest it correctly. This is the best we’ve had for decades.

Figure 1. Proterochampsa as drawn by Reig 1959..

Figure 1. Proterochampsa as drawn by Reig 1959..

Photographs are better. 
Trotteyn (2011) was kind enough to include a photograph or three of the actual specimen (Fig. 2) in her PhD dissertation. It’s a little different, and provides great data.

Figure 2. The skull of Proterochampsa (PVSJ 77) colorized here for bone identification.

Figure 2. The skull of Proterochampsa (PVSJ 77) colorized here for bone identification. The mandible was rotated during crushing. Tip of the mandible is oddly shaped, perhaps due to breakage. Not sure. Most of the teeth are broken at the root line. DGS provides a little more detail on a difficult skull. 

DGS provides a little more detail here. And we can trust the photo a little more than the drawing. It’s a shame they didn’t provide a photo decades ago.

The holotype (PVSJ 77) is only known from a skull. Earlier we looked at a much larger Proterochampsa (PVSJ 606) known from more complete material.

References
Reig OA 1959 Primeros datos descriptivos sobre nuevos Reptiles Arcosaurios del Triasico de Ischigualsto (San Juan, Argentina): Revista de la Asociacion Geologica Argentina, tomo 13, n. 4, p. 257-270.
Trotteyn MJ and Haro JA. In Press. The braincase of a specimen of Proterochampsa Reig (Archosauriformes: Proterochampsidae) from the Late Triassic of Argentina. Paläontologische Zeitschrift. Published on-line May 11 2010. DOI 10.1007/s12542-010-0068-7
Trotteyn MJ 2011. Material postcraneano de Proterochampsa barrionuevoi Reig, 1959 (Diapsida: Archosauriformes) del Triásico Superior del centro-oeste de Argentina. Ameghiniana 48:424-446.
Trotteyn MJ 2011. Revisión osteologica, análisis filogenético y paleoecología de proterochampsidae (Reptilia – Archosauriformes). Tesis Doctoral. Instituto y Museo de Cienciea Naturales Universidad Nacional de San Juan. CONICET.

wiki/Proterochampsa

 

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