Hemicytheridae Puri, 1953
Poseidonamicus anteropunctatus Whatley, Downing, Kesler & Harlow, 1986
Poseidonamicus dinglei Boomer, 1999
Poseidonamicus hisayoae Yasuhara, Cronin, Hunt, Hodell, 2009
Poseidonamicus hunti Brandão & Päplow, 2011
Poseidonamicus major Benson, 1972
Poseidonamicus minor Benson, 1972
Poseidonamicus miocenicus Benson & Peypouquet, 1983
Poseidonamicus nudus Benson, 1972
Poseidonamicus ocularis Whatley, Downing, Kesler & Harlow, 1986
Poseidonamicus panopsus Whatley & Dingle, 1989
Poseidonamicus pintoi Benson, 1972
Poseidonamicus praenudus Whatley, Downing, Kesler & Harlow, 1986
Poseidonamicus pseudorobustus Coles & Whatley, 1989
Poseidonamicus punctatus Whatley, Downing, Kesler & Harlow, 1986
Poseidonamicus riograndensis Benson & Peypouquet, 1983
Poseidonamicus robustus Whatley, Downing, Kesler & Harlow, 1986
Poseidonamicus rudis Whatley, Downing, Kesler & Harlow, 1986
Poseidonamicus tainae Brandão in Brandão & Päplow, 2011
Poseidonamicus viminea (Brady, 1880)
Poseidonamicus whatleyi Dingle, 2003
Poseidonamicus yasuharai Brandão & Päplow, 2011
