Jiangxispira yangouensis (FOSSIL) Pan & al., 2003 †
Laxella micra (FOSSIL) Pan & Erwin, 2002 †
Mapesella meeki (FOSSIL) (Knight, 1931 †)
Streptacis complanata (FOSSIL) Hoare & al., 1997 †
Streptacis fragilis (FOSSIL) Pan & Erwin, 2002 †
Streptacis inflata (FOSSIL) Erwin, 1988 †
Streptacis ingens (FOSSIL) Hoare & al., 1997 †
Streptacis orientalis (FOSSIL) A. Nützel & Nakazawa,2012 †
Streptacis permiana (FOSSIL) (Beede, 1907 †)
Streptacis piercei (FOSSIL) Erwin, 1988 †
Streptacis pravis (FOSSIL) Pan & Erwin, 2002 †
Streptacis regularis (FOSSIL) Pan & Erwin, 2002 †
Streptacis scalpta (FOSSIL) Knight, 1931 †
Streptacis subgracilis (FOSSIL) (Netschajew, 1894 †)
Streptacis whitfieldi (FOSSIL) F.B. Meek, 1871 †