Panphagia (2009) = Pampadromaeus (2011)


Figure 1. Panphagia protos with a closeup of the skull. Note how slender the pubis is in lateral view.

Panphagia protos
Martinez and Alcobar 2009 described a small, basal dinosaur that nested at the base of the Sauropodomorpha. I ran the traits of Panphagia protos through the large reptile matrix and every one matched up to Pampadromaeus (Cabreira et al. 2011). Likely not conspecific, the two appear to be congeneric. Panphagia protos (Martinez and Alcobar 2009) has seniority. The ilium is more robust in Pampadromaeus. The scapula is more robust in Panphagia. Both nested between theropods and phytodinosaurs, basal to Daemonosaurus.

Pampadromaeus in left lateral view.

Figure 2. Pampadromaeus in left lateral view from Cabreira et al. 2011.

The Pubis
The pubis in lateral view is very slender (but not in anterior view). This is the first clue I’ve seen as to the origin of the retroverted slender pubis in ornithischia, a clade that originated in sister taxa to basal sauropodomorpha like Panphagia.

As always, I encourage readers to see specimens, make observations and come to your own conclusions. Test. Test. And test again.

Evidence and support in the form of nexus, pdf and jpeg files will be sent to all who request additional data.

Cabreira SF, Schultz CL, Bittencourt JS, Soares MB, Fortier DC, Silva LR and Langer MC 2011. New stem-sauropodomorph (Dinosauria, Saurischia) from the Triassic of Brazil. Naturwissenschaften (advance online publication) DOI: 10.1007/s00114-011-0858-0

Martínez RN and Alcober OA 2009. A basal sauropodomorph (Dinosauria: Saurischia) from the Ischigualasto Formation (Triassic, Carnian) and the early evolution of Sauropodomorpha (pdf). PLoS ONE 4 (2): 1–12. doi:10.1371/journal.pone.0004397. PMC 2635939. PMID 19209223. online article


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