Holozoidae Berrill, 1950
Sycozoa anomala Millar, 1960
Sycozoa arborenscens Hartmeyer, 1912
Sycozoa arborescens Hartmeyer, 1912
Sycozoa brevicauda Kott, 1990
Sycozoa cavernosa Kott, 1990
Sycozoa cerebriformis (Quoy & Gaimard, 1834)
Sycozoa gaimardi (Herdman, 1886)
Sycozoa georgiana (Michaelsen, 1907)
Sycozoa kanzasi (Oka, 1930)
Sycozoa melopepona Monniot, 1975
Sycozoa mirabilis (Oka, 1912)
Sycozoa murrayi (Herdman, 1886)
Sycozoa pedunculata (Quoy & Gaimard, 1834)
Sycozoa pulchra (Herdman, 1886)
Sycozoa seiziwadai Tokioka, 1952
Sycozoa sigillinoides Lesson, 1830
Sycozoa umbellata (Michaelsen, 1898)
