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Aglaocrinus is an extinct species of crinoids in the Cladia order.^{[5][6][7][8][9]} It has been proposed that it was a blind, stationary (attached) suspension feeder the hard parts of which were composed of magnesium calcite.^[10][11] It has been discovered in 3 locations in North America.^[2]

There are currently 12 species in this genus, consisting of:

• Aglaocrinus cranei (Strimple, 1971);^{[12][13][14][15]} also known as Aaglaocrinus cranei^{[16][17][18][19]}
• Aglaocrinus expansus^[20]
• Aglaocrinus keytei (Strimple & Moore 1973);^[21][22] also known as Aaglaocrinus keytai^{[23][24][25][26][27]}
• Aglaocrinus konecnyorum (Webster 1981)^[28][29]
• Aglaocrinus magnus (Strimple 1949)^{[30][31][32][33]}
• Aglaocrinus nacoensis (Webster 1981)^[34][35]
• Aglaocrinus oklahomensis (Moore & Plummer 1938);^[36][37][38] also known as Ethelocrinus oklahomensis (Moore & Plummer, 1938)^[39]
• Aglaocrinus rectilatus (Lane & Webster, 1966)^{[40][41][42][43][44][45]}
• Aglaocrinus supplantus (Pabian & Strimple 1974);^[46][47][48] also known as Aaglaocrinus supplantus^{[49][50][51][52]}
• Aglaocrinus sutherlandi (Strimple 1980)^[53][54]
• Aglaocrinus tuberculatus (Meek & Worthen 1867)^[55][56][57]
• Aglaocrinus verrucosus(White & St John 1868);^[58][59] also known as Hydreionocrinus verrucosus (White & St John 1868)^[60][61]

• Late Desmoinesian crinoid faunule from Oklahoma. Bulletin of the Oklahoma Geological Survey, 93 1961: 1–189. [Zoological Record Volume 98]
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