A non-ornithodire! Woo. Still a short post though, sorry. This is a superb mount of
Leptosuchus (errr, well I think so, forgot to check) Redondasaurus (though see the comments thread) from the Triassic section of the Carnegie. It is nice to see things other than the dinosaurs and pterosaurs (or icthyosaurs and plesiosaurs for that matter) get a look in, and this was something I’d never seen before. Oddly enough I have a nice schematic of the skull that I stole form somewhere years ago that I use in a lecture to emphasise some of the issues in creating characters in cladistic analyses and convergences.
This does have a pretty crocodilian-like snout and is certainly a good candidate for a classic piece of convergence in morphofunction. But here it is the premaxilla that has elongated, whereas crocs generally have a short premaxilla and most of the elongation comes from a long maxilla. Thus there is a clear difference in the manner in which the lengthening has happened. And from a cladistic point of view therefore, there is a big difference between a character along the lines of “elongate snout” and “elongate maxilla”, the former unifying the two, the latter separating them.