After Carroll, 1988, and Frickhinger, 1995, with species from “Paleobiology Database”

<==o †Birgeriidae Berg, 1940
   |?- †Psilichthys Hall, 1900; Trias. or Jur. Aus.
   |--o †Birgeria Stensiö, 1919 [Xenestes] L. Trias. Spits. Gr. NA. Mad. L.-U. Trias. Eu.
   |  |?- †B. acuminata
   |  |-- †B. gronlandica Stensiö, 1932
   |  |-- †B. liui Jin, 2001
   |  `-- †B. mougeoti Agassiz, 1844 [Saurichthys mougeoti]
   `-- †Ohmdenia multidentata Hauff, 1953 L. Jur. Eu. [a pachycormid?]

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