After Bell, 1997, and Creisler [& Poling], 2000

<==o †“Russelosaurinae” [Tylosaurinae & Plioplatecarpinae]
   |?- †Russellosaurus
   |--o †“Tylosaurini” (Williston, 1897) sensu Bell, 1997
   |  |?- †Lakumasaurus antarcticus Novas et al., 2002
   |  `--o †Tylosaurus Marsh, 1872 sensu lato [taxonomic history]
   |     |-- †“Tylosaurus” kansasensis Everhart, 2005 [was “Tylosaurus n. sp. under description” (Bell, 1997)]
   |     |-- †“Tylosaurus” ivoensis (Persson, 1963) U. Cret. NEu. [†Mosasaurus ivoensis Persson, 1963]
   |     `--+-- †“Tylosaurus” nepaeolicus (Cope, 1874)
   |        `--+-- †Tylosaurus proriger (Cope, 1869); Marsh, 1872 [taxonomic history]
   |           `--+?- †Taniwhasaurus oweni Hector, 1874 [taxonomic history]
   |              `--o †Hainosaurus Dollo, 1885
   |                 |-- †H. bernardi Dollo, 1885
   |                 `-- †H. pembinensis Nicholls, 1988
   `--o †Plioplatecarpini (Dollo, 1884) sensu Bell, 1997
      |?- †Angolosaurus bocagei Telles-Antunes, 1964 [“Platecarpus" bocagei (Telles-Antunes, 1964)]
      |?- †Igdamanosaurus aegyptiacus (Zdansky, 1935) [Globidens aegyptiacus Zdansky, 1935]
      |?- †Selmasaurus russelli Wright & Shannon, 1988
      |?- †Yaguarasaurus colombianus Paramo, 1994
      |--o †Ectenosaurus Russell, 1967
      |  |-- †E. clidastoides (Merriam, 1894)
      |  `-- †E. sp.
      `--o †Platecarpus Cope, 1869 sensu lato
         |-- †“Platecarpus” planifrons (Cope, 1874) [Clidastes planifrons Cope, 1874]
         |?- †“Platecarpus” coryphaenus (Cope, 1872) [Holcodus coryphaenus Cope, 1872]
         |?- †“Platecarpus” ictericus (Cope, 1872) [Holcodus ictericus Cope, 1872]
         `--+-- †Platecarpus tympaniticus Cope, 1869 [type of Platecarpus]
            `--o †Plioplatecarpus Dollo, 1882 [Oterognathus Dollo, 1889]
               |?- †“Mosasaurus” scanicus
               |?- †“Platecarpus” somenensis
               |?- †P. crassartus
               |?- †P. depressus [Baptosaurus fraternus Cope, 1869-70]
               |-- †P. sp. [UNO 861-2] [Holmes, 1996] [Late Cretaceous, Bearpaw Formation, North America]
               `--+-- †P. primaevus Russell, 1967
                  `--+-- †P. houzeaui (Dollo, 1889) [Oterognathus houzeaui Dollo, 1889]
                     `-- †P. marshii Dollo, 1882

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