"Family" -level phylogeny of "Ichthyosauromorpha"

 
<==o †"ICHTHYOSAUROMORPHA"
   |?- †Hupehsuchidae [Hupehsuchia:]
   `--o †ICHTHYOPTERYGIA
      |== †Utatsusauridae [paraphyletic assemblage of basal ichthyopterygians]
      `--o EOICHTHYOSAURIA [Ichthyosauria sensu lato]
         |-- †Grippidae [Grippidia:]
         `--o †ICHTHYOSAURIA
            |?- †Leptopterygiidae
            |?- †Protoichthyosauridae
            |-- †Cymbospondylidae [paraphyletic assemblage of basal ichthyosaurs]
            `--+-- †Mixosauridae [Mixosauria:]
               `--o †MERRIAMOSAURIA
                  |-- †Shastasauridae [Shastasauria:]
                  `--o †EUICHTHYOSAURIA
                     `--o †PARVIPELVIA
                        |-- †Eurhinosauridae [Eurhinosauria:]
                        `--o †THUNNOSAURIA
                           |-- †Stenopterygidae
                           `--+-- †Ichthyosauridae
                              `-- †Ophthalmosauridae [Ophthalmosauria:]

Reference(s):

Motani, R., 1999: Phylogeny of the Ichthyopterygia.
--Journal Of Vertebrate Paleontology: Vol. 19, #3, pp. 473 - 496.

Motani, R., 1999: On the evolution and homologies of ichthyopterygian forefins.
--Journal Of Vertebrate Paleontology: Vol. 19, #1, pp. 28 - 41.

Motani, R., 2000: Is Omphalosaurus ichthyopterygian? - A phylogenetic perspective.
--Journal Of Vertebrate Paleontology: Vol. 20, #2, pp. 295-301

Motani, R., Minoura, N. & Ando, T., 1998: Ichthyosaurian relationships illuminated by new primitive skeletons from Japan.
–Nature: Vol. 393, 21 May. pp. 255-257

Motani, R., You, H., & McGowan, C., 1996: Eel-like swimming in the earliest ichthyosaurs.
–Nature: Vol. 382, 25 July, pp. 347-348

 

© Mikko Haaramo, / Last updated 2002-12-25 / http://www.helsinki.fi/~mhaaramo