outgroup
Taxon_Novum
Carsosaurus_marchesetti
Aigialosaurus_buccichi
Dallas_aigialosaur
Aigialosaurus_dalmaticus
Halisaurus_cf_sternbergi
Halisaurus_sternbergi
Halisaurus_platyspondylus
Halisaurus_n_sp
Platecarpus_planifrons
Ectenosaurus_clidastoides
Tylosaurus_n_sp
Mosasaurus_missouriensis
Clidastes_n_sp