Sometimes we miss the big picture.
Here then, for your approval and disapproval are comparisons between closest kin found by the Nesbitt (2011) tree versus those found by the large reptile tree. Over the last few days we looked at problems with Mesosuchus, Vancleavea, Euparkeria and Parasuchus.
You knew this was coming!
Today we’ll look at Nesbitt’s odd nesting of pterosaurs in this clade.
- Pterosaur Kin According to Nesbitt (2011)
Here (Fig. 2) are the selected Nesbitt (2011) sisters for visual comparison.
Pterosaur kin according to the Large Reptile Tree
The large reptile tree found Huehuecuetzpalli, Cosesaurus and Longisquama (Fig. 3) to be successively closer to pterosaurs because they share an increasing number of pterosaurian traits.
One look at these results brings immediate understanding that there’s something wrong in the Nesbitt (2011) matrix that produces such strange bedfellows and no indication of a gradual accumulation of character traits. Pterosaurs and their origins have been covered perhaps more than any other subject here and at reptileevolution.com, for those who want more details.
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.
Nesbitt SJ 2011. The early evolution of archosaurs: relationships and the origin of major clades. Bulletin of the American Museum of Natural History 352: 292 pp.