The supratemporal bone of ichthyosaurs is functionally convergent with the squamosal of diapsids. The size and configuration of the supratemporal casts doubt on the supposition that ichthyosaurs were diapsids.doi:10.1080/08912960127806Maisch, Michael W.Hungerbühler, Axel...
These include a large, robust humerus that is proximodistally longer than the scapula (scapula length vs humerus length ratio: ~0.68); forefins which are significantly longer but less than twice the length of the hindfin (forefin length vs hindfin length ratio: ~1.51); the relative size ...
The supratemporal bone of ichthyosaurs is functionally convergent with the squamosal of diapsids. The size and configuration of the supratemporal casts doubt on the supposition that ichthyosaurs were diapsids.MichaelInstitutW.InstitutMaischInstitut&InstitutAxelInstitutHungerbühlerInstitut...