After Shackleton, 2005, with species from the “Paleobiology Database”:

<==o †Palasteriscidae Gregory, 1900 [incl. Urasterellidae Schuchert, 1914]
   |--o †Urasterellinae Schuchert, 1914
   |  |?- †Bohemaster Jaekel 1923
   |  |?-o †Salteraster Stürtz, 1893
   |  |  |-- †S. biradialis
   |  |  |-- †S. coronella
   |  |  |-- †S. imbricatus
   |  |  `-- †S. selwyni
   |  |?-o †Ulrichaster Spencer, 1950
   |  |  |-- †U. macrodentatus
   |  |  `-- †U. ulrichi
   |  |--o †Cnemidactis Spencer, 1918
   |  |  |-- †C. girvanensis (Schuchert, 1914)
   |  |  |-- †C. macroadambulacralatas
   |  |  `-- †C. osloensis
   |  `--o †Urasterella McCoy, 1851
   |     |-- †U. asperula [Roemeraster asperula]
   |     |-- †U. asperrimus (Salter, 1857)
   |     |-- †U. constellata
   |     |-- †U. creswelli
   |     |-- †U. grandis
   |     |-- †U. gutterfordensis
   |     |-- †U. huxleyi
   |     |-- †U. montana
   |     |-- †U. pulchella
   |     |-- †U. ruthveni
   |     |-- †U. thraivensis
   |     `-- †U. verruculosa
   `--o †Palasteriscinae Gregory, 1900
      |-- †Lanthanaster cruciformis Branstrator, 1972
      `--+-- †Platanaster ordovicus Spencer, 1919
         `--o †Baliactis Spencer, 1927
            |-- †B. ordovicus Spencer, 1922
            |-- †B. devonicus
            |-- †B. scutatus
            `-- †B. tuberatus

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