Hyphantozyga noinskyi (FOSSIL) Mazaev, 2015 †
Pseudozygopleura obliqua (FOSSIL) Batten, 1985 †
Plocezyga obscura (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura obtusicacuminis (FOSSIL) Knight, 1930 †
Microptychis occabus (FOSSIL) Hoare & Sturgeon, 1981 †
Stephanozyga ornamentaria (FOSSIL) (Netchaev, 1894 †)
Plocezyga ornata (FOSSIL) (Mark, 1912 †)
Plocezyga ornatissima (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura pagoda (FOSSIL) Knight, 1930 †
Pseudozygopleura palus (FOSSIL) Hoare & Sturgeon, 1981 †
Pseudozygopleura pandus (FOSSIL) Hoare & Sturgeon, 1981 †
Pseudozygopleura peoriense (FOSSIL) (A.H. Worthen, 1884 †)
Hyphantozyga perattenuata (FOSSIL) Hoare & Sturgeon, 1980 †
Plocezyga percostata (FOSSIL) Knight, 1930 †
Microptychis permiana (FOSSIL) Batten, 1985 †
Plocezyga perminuta (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura perversa (FOSSIL) Knight, 1930 †
Pseudozygopleura pinquicula (FOSSIL) Hoare & Sturgeon, 1985 †
Pseudozygopleura pleurozyga (FOSSIL) Batten, 1985 †
Pseudozygopleura plummeri (FOSSIL) Knight, 1930 †
Pseudozygopleura pluricostata (FOSSIL) Knight, 1930 †
Pseudozygopleura praeacuta (FOSSIL) Knight, 1930 †
Pseudoplocezyga propria (FOSSIL) Licharev, 1975 †
Pseudozygopleura pugonis (FOSSIL) Hoare & Sturgeon, 1981 †
Hyphantozyga pulchra (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura pulchra (FOSSIL) Knight, 1930 †
Pseudozygopleura pupa (FOSSIL) Knight, 1930 †
Pseudozygopleura Pyrgozyga (FOSSIL) Knight 1930 †
Pseudozygopleura recticostata (FOSSIL) Knight, 1930 †
Pseudozygopleura rectus (FOSSIL) Hoare & Sturgeon, 1981 †
Plocezyga regularia (FOSSIL) Hoare & Sturgeon, 1980 †
Pseudozygopleura restis (FOSSIL) Knight, 1930 †
Pseudozygopleura rothi (FOSSIL) Knight, 1930 †
Stephanozyga rugifera (FOSSIL) (B. Phillips 1836 †)
Pseudozygopleura schucherti (FOSSIL) Knight, 1930 †