[The analysis by Chesnut and Ettensohn, 1988 is used for this phylum.]
Class Blastoidea Say, 1825
Order Spiraculata Jaeckel, 1918
Family Pentremitidae d'Orbigny, 1851
Genus Pentremites Say, 1820
Pentremites tulipaeformis Hambach, 1903
Pentremites elegans Lyon, 1860
Pentremites robustus Lyon, 1860
Pentremites pyriformis Say, 1825
Class Edrioasteroidea Billings, 1858
Order Isorophida Bell, 1976
Suborder Isorophina Bell, 1976
Family Agelacrinitidae Clarke, 1901
Genus Lepidodiscus Meek and Worthen, 1868
Lepidodiscus laudoni (Bassler, 1936)
Genus Ulrichidiscus Bassler, 1935
Ulrichidiscus pulaskiensis (Miller and Gurley, 1894)
Class Crinoidea Miller, 1821
Subclass Camerata Wachsmuth and Springer, 1885
Order Monobathrida Moore and Laudon, 1943
Suborder Compsocrinina Ubaghs, 1978
Superfamily Hexacrinitacea Wachsmuth and Springer, 1885
Family Dichocrinidae Miller, 1889
Subfamily Talarocrininae Ubaghs, 1953
Genus Pterotocrinus Lyon and Casseday, 1859
Pterotocrinus acutus Wetherby, 1879
[This species includes many former species that were widely recognized.]
Pterotocrinus depressus Lyon and Casseday, 1860
Genus Talarocrinus Wachsmuth and Springer, 1881
Talarocrinus decornis Wachsmuth and Springer, 1897
Subfamily Dichocrininae Miller, 1889
Genus Hyrtanecrinus Broadhead and Strimple, 1980
Hyrtanecrinus pentalobus (Casseday and Lyon, 1862)
Genus Strimplecrinus Broadhead, 1981
Strimplecrinus superstes (Wachsmuth and Springer, 1897)
Subfamily Camptocrininae Broadhead, 1981
Genus Camptocrinus Wachsmuth and Springer, 1897
Camptocrinus cirrifer (Wachsmuth and Springer, 1897)
Family Acrocrinidae Wachsmuth and Springer, 1885
Subfamily Acrocrininae Wachsmuth and Springer, 1885
Genus Acrocrinus Yandell, 1855
Acrocrinus shumardi Yandell, 1855
Subclass Inadunata Wachsmuth and Springer, 1885
Order Disparida Moore and Laudon, 1943
none were found
Order Cladida Moore and Laudon, 1943
Suborder Poteriocrinitina Jaeckel, 1918
Superfamily Zeacrinitacea Bassler and Moodey, 1943
Family Zeacrinitidae Moore and Laudon, 1943
Genus Zeacrinites Troost, 1858
Zeacrinites wortheni (Hall, 1858)
Genus Bicidiocrinus Strimple, 1975
Bicidiocrinus wetherbyi (Wachsmuth and Springer, 1886)
Genus Tholocrinus Kirk, 1939
Tholocrinus spinosus (Wood, 1909)
Genus Linocrinus Kirk, 1938
Linocrinus laurelensis Chesnut and Ettensohn, 1988
Superfamily Pirasocrinacea Moore and Laudon, 1943
Family Pirasocrinidae Moore and Laudon, 1943
Genus Dasciocrinus Kirk, 1939
Dasciocrinus florialis (Yandell and Shumard, 1847)
Superfamily Texacrinacea Strimple, 1961
Family Cymbiocrinidae Strimple and Watkins, 1969
Genus Cymbiocrinus Kirk, 1944
Cymbiocrinus grandis Kirk, 1944
Genus Aenigmocrinus Strimple, 1973
Aenigmocrinus anomalos (Wetherby, 1880)
Superfamily Scytalocrinacea Moore and Laudon, 1943
Family Scytalocrinidae Moore and Laudon, 1943
Genus Phacelocrinus Kirk, 1940
Phacelocrinus longidactylus (McChesney, 1860)
Phacelocrinus bisselli (Worthen, 1873)
Genus Pulaskicrinus Chesnut and Ettensohn, 1988
Pulaskicrinus campanulus (Horowitz, 1965)
Genus Wetherbyocrinus Chesnut and Ettensohn, 1988
Wetherbyocrinus pulaskiensis (Miller and Gurley, 1896)
Family Blothrocrinidae Moore and Laudon, 1943
Genus Culmicrinus Jaeckel, 1918
Culmicrinus vagulus (Miller and Gurley, 1895)
Family Aphelecrinidae Strimple, 1967
Genus Aphelecrinus Kirk, 1944
Aphelecrinus randolphensis (Worthen, 1873)
Superfamily Lophocrinacea Bather, 1899
Family Stellarocrinidae Strimple, 1961
Genus Rhopocrinus Kirk, 1942
Rhopocrinus spinosus Kirk, 1942
Superfamily Agassizocrinacea Miller, 1889
Family Ampelocrindae Kirk, 1942
Genus Ampelocrinus Kirk, 1942
Ampelocrinus kaskaskiensis (Worthe, 1882)
Family Agassizocrinidae Miller, 1889
Genus Anartiocrinus Kirk, 1940
Anartiocrinus lyoni Kirk, 1940
Genus Agassizocrinus Owen and Shumard, 1852
Agassizocrinus conicus Owen and Shumard, 1852
Agassizocrinus cf. A. dactyliformis Shumard, 1853
Superfamily Decadocrinacea Bather, 1890
Family Decadocrinidae Bather, 1890
Genus Ramulocrinus Laudon, Parks and Spreng, 1952
Ramulocrinus milleri (Wetherby, 1881)
Superfamily Cromyocrinacea Bather, 1890
Family Phanocrinidae Knapp, 1969
Genus Phanocrinus Kirk, 1937
Phanocrinus maniformis (Yandell and Shumard, 1847)
Phanocrinus parvaramus Sutton and Winkler, 1940
Genus Pentaramicrinus Sutton and Winkler, 1940
Pentaramicrinus gracilis (Wetherby, 1880)
Family Eupachycrinidae Miller, 1889
Genus Eupachycrinus Meek annd Worthen, 1865
Eupachycrinus boydii Meek and Worthen, 1870
Subclass Flexibilia Zittel, 1879
Order Taxocrinida Springer, 1913
Superfamily Taxocrinacea Angelin, 1878
Family Synerocrinidae Jaeckel, 1918
Genus Onychocrinus Lyon and Casseday, 1860
Onychocrinus pulaskiensis Miller and Gurley, 1895
Family Taxocrinidae Angelin, 1878
Genus Taxocrinus Phillips in Morris, 1843
Taxocrinus whitfieldi (Hall, 1858)
Class Echinoidea Leske, 1778
Subclass Perischoechinoidea M'Coy, 1849
Order Echinocystitoida Jackson, 1912
Family Lepidesthidae Jackson, 1896
Genus Lepidesthes Meek and Worthen, 1868
Lepidesthes formosa Miller, 1879
Order Palaechinoida Haeckel, 1866
Family Palaechinidae M'Coy, 1849
Genus Palaechinus M'Coy, 1844
Palaechinus jacksoni Chesnut and Ettensohn, 1988
Order Cidaroida Claus, 1880
Family Archaeocidaridae M'Coy, 1844
Genus Archaeocidaris M'Coy, 1844
Archaeocidaris hemispinifera Chesnut and Ettensohn, 1988
Subphylum Asterozoa Zittel, 1895
Class Stelleroidea Lamarck, 1816
Subclass Ophiuroidea Gray, 1840
Order Phrynophiurida Matsumoto, 1915
Suborder Euryalina Lamarch, 1816
Family Onychasteridae Miller, 1889
Genus Onychaster Meek and Worthen, 1868
Onychaster strimplei Bjork, Goldbert, and Kesling, 1968
Order Oegophiurida Matsumoto, 1915
Suborder Lysophiurina Gregory, 1896
?Family Encrinasteridae Schuchert, 1914
encrinasterid species
Subclass Asteroidea Blainville, 1830
Order Spinulosida Perrier, 1884
Suborder Eugnathina Spencer and Wright, 1966
Family Taeniactinidae Spencer, 1927
Genus Callyptactis Spencer, 1930
Calyptactis spenceri Chesnut and Ettensohn, 1988
