I’m in the paleontology fandom. I ship the cranial display structures present in many lineages of Ornithodirans with the hypothesis that these structures evolved due to mutual sexual selection, as proposed by Hone et al. 2011.
Last I checked, it was a clade of croc-line archosaurs, named for their unique interlocking ankle joint. But it includes a family of crocs that AREN’T CROCS, but just outside of archosaurs, meaning Crurotarsi must include ALL ARCHOSAURS, including Ornithodirans, whose defining characteristic is NOT having said interlocking ankle.