†unranked clade Merriamosauria Motani 1999 (ichthyosaur)
Full reference: R. Motani. 1999. Phylogeny of the Ichthyopterygia. Journal of Vertebrate Paleontology 19(3):473-496
Parent taxon: Hueneosauria according to B. C. Moon 2017
See also Ji et al. 2016, Maisch 2010, Maisch and Matzke 2000, Maisch et al. 2006, McGowan and Motani 2003, Moon 2019 and Motani 1999
Sister taxa: Longipinnati, Merriamosauriformes, Mixosauridae
Subtaxa: Besanosauridae Californosauridae Euichthyosauria Guanlingsauridae Merriamosauridae Shastasauria Shastasauridae Shonisauridae Thalattoarchon
Ecology: nektonic carnivore