Pseudozygopleura irrugata (FOSSIL) Hoare & Sturgeon, 1985 †
Microptychis jacksoni (FOSSIL) Longstaff †
Pseudozygopleura kellettae (FOSSIL) Knight, 1930 †
Hyphantozyga knighti (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura knighti (FOSSIL) (E.L. Yochelson, 1962 †)
Pseudozygopleura lanceolatus (FOSSIL) Hoare & Sturgeon, 1981 †
Hemizyga larga (FOSSIL) B.S. Kues & Batten,2001 †
Pseudozygopleura lefebvrei (FOSSIL) (Léveillé, 1835 †)
Pseudozygopleura leveneae (FOSSIL) Knight, 1930 †
Pseudozygopleura limus (FOSSIL) Hoare & Sturgeon, 1981 †
Plocezyga lineata (FOSSIL) Hoare & Sturgeon, 1980 †
Plocezyga lirata (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura lirata (FOSSIL) Batten, 1985 †
Stephanozyga lisaspira (FOSSIL) B.S. Kues & Batten,2001 †
Stephanozyga longnorensis (FOSSIL) Longst 1933 †
Pseudozygopleura macra (FOSSIL) Knight, 1930 †
Stephanozyga magna (FOSSIL) Wang, 1987 †
Plocezyga mapesi (FOSSIL) A. Nützel, 1998 †
Plocezyga markae (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura marvinwelleri (FOSSIL) Knight, 1930 †
Hyphantozyga matanensis (FOSSIL) Pan & Yu, 1993 †
Cyclozyga micra (FOSSIL) (Beus, 1978 †)
Pseudozygopleura micra (FOSSIL) Pan & Erwin, 2002 †
Cyclozyga mirabilis (FOSSIL) Knight, 1930 †
Pseudozygopleura moorei (FOSSIL) Knight, 1930 †
Gamizyga morningstarae (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura mucronatus (FOSSIL) Hoare & Sturgeon, 1981 †
Pseudozygopleura multicostata (FOSSIL) (F.B. Meek& A.H. Worthen, 1862 †)
Pseudozygopleura mutabilis (FOSSIL) B.S. Kues, 2004 †
Pseudozygopleura nana (FOSSIL) (Girty, 1915 †)
Cyclozyga neotenica (FOSSIL) Elias, 1958 †
Pseudozygopleura nigra (FOSSIL) Knight, 1930 †
Stephanozyga nishimurai (FOSSIL) T. Kase, 1988 †
Gamizyga nitida (FOSSIL) Hoare & Sturgeon, 1980 †
Stephanozyga nodosa (FOSSIL) (Girty, 1915 †)