†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 Maisch 2010, Maisch and Matzke 2000, Maisch et al. 2006, McGowan and Motani 2003 and Motani 1999
Sister taxa: Longipinnati, Merriamosauriformes, Mixosauridae
Subtaxa: Besanosauridae Californosauridae Euichthyosauria Guanlingsauridae Merriamosauridae Shastasauria Shastasauridae Shonisauridae Thalattoarchon
Ecology: nektonic carnivore