Pseudozygopleura scitula (FOSSIL) (F.B. Meek& A.H. Worthen, 1860 †)
Pseudozygopleura scruposus (FOSSIL) Hoare & Sturgeon, 1981 †
Pseudozygopleura semicostata (FOSSIL) (F.B. Meek, 1871 †)
Plocezyga serocorona (FOSSIL) Batten, 1985 †
Pseudozygopleura sinuosior (FOSSIL) Knight, 1930 †
Cyclozyga sinusigera (FOSSIL) E.K. Yoo, 1988 †
Pseudozygopleura sturgeoni (FOSSIL) A. Nützel, 1998 †
Pseudozygopleura subclathrata (FOSSIL) (A. Römer, 1843 †)
Plocezyga subnodosa (FOSSIL) Hoare & Sturgeon, 1980 †
Stephanozyga subnodosa (FOSSIL) Knight, 1930 †
Plocezyga subquadrata (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura subulatus (FOSSIL) Hoare & Sturgeon, 1981 †
Eoptychia sulcata (FOSSIL) (de Koninck, 1881 †)
Plocezyga tenuilirata (FOSSIL) Knight, 1930 †
Plocezyga tenuis (FOSSIL) Knight, 1930 †
Eoptychia tenuistriata (FOSSIL) (Portlock, 1843 †)
Pseudozygopleura tenuivirga (FOSSIL) Knight, 1930 †
Pseudozygopleura terebrus (FOSSIL) Knight, 1930 †
Pseudozygopleura teres (FOSSIL) (Girty, 1915 †)
Hyphantozyga textilis (FOSSIL) Hoare & Sturgeon, 1980 †
Microptychis trochus (FOSSIL) Knight, 1930 †
Plocezyga turbinata (FOSSIL) Hoare & Sturgeon, 1980 †
Microptychis turbineus (FOSSIL) Hoare & Sturgeon, 1981 †
Helminthozyga undulata (FOSSIL) Hoare & Sturgeon, 1978 †
Plocezyga varica (FOSSIL) Pan & Erwin, 2002 †
Pseudozygopleura variegata (FOSSIL) Hoare & Sturgeon, 1985 †
Helminthozyga vermiculus (FOSSIL) Knight, 1930 †
Pseudozygopleura warthini (FOSSIL) Knight, 1930 †
Pseudozygopleura werneri (FOSSIL) Knight, 1930 †
Microptychis williamsi (FOSSIL) Knight, 1930 †
Microptychis wrighti (FOSSIL) Longst, 1912 †
Pseudozygopleura yandellana (FOSSIL) (J.W. Hall, 1856 †)
Plocezyga yunnanensis (FOSSIL) Pan & Erwin, 2002 †