Full reference: O. Rieppel. 1994. Osteology of Simosaurus gaillardoti and the relationships of stem-group Sauropterygia. Fieldiana: Geology, new series 28:1-85
Parent taxon: Sauropterygia according to Y. Hu et al. 2024
See also Araújo et al. 2015, Cheng et al. 2016, Jiang et al. 2018, Jiang et al. 2014, Klein and Albers 2009, Klein et al. 2022, Li and Liu 2020, Lin et al. 2019, O'Keefe 2001, Renesto et al. 2014, Rieppel 1994, Rieppel 1998, Rieppel 1999, Rieppel 2000, Rieppel 2001, Rieppel et al. 1997, Sato et al. 2014 and Xu et al. 2023
Sister taxa: Atopodentatus, Cercidopleura, Dicranopleura, Eusauropterygia, Ischyrosaurus, Microleptosaurus, Nanchangosauroidea, Nothosauria, Nothosauriformes, Pistosauria, Placodontia, Placodontiformes, Plesiosauria, Simosauria
Subtaxa: Corosaurus Cymatosauridae Dawazisaurus Diandongosaurus Hispaniasaurus Majiashanosaurus Nothosauridae Nothosauroidea Nothosaurus picardi Pachypleurosauria Pachypleurosauroidea Pistosauroidea Qianxisaurus Wumengosaurus
Ecology: