Streptacis complanata (FOSSIL) Hoare & al., 1997 †
Streptacis fragilis (FOSSIL) Pan & Erwin, 2002 † China, Guangxi, Heshan
Streptacis inflata (FOSSIL) Erwin, 1988 † USA, Texas, Hudspeth
Streptacis ingens (FOSSIL) Hoare & al., 1997 †
Mapesella meeki (FOSSIL) (Knight, 1931 †) USA, Missouri, Saint Louis
Laxella micra (FOSSIL) Pan & Erwin, 2002 † China, Guangxi, Heshan
Streptacis orientalis (FOSSIL) A. Nützel & Nakazawa,2012 † Japan, Gifu
Streptacis permiana (FOSSIL) (Beede, 1907 †) United States, Texas, Culberson
Streptacis piercei (FOSSIL) Erwin, 1988 † USA, Texas, Culberson
Streptacis pravis (FOSSIL) Pan & Erwin, 2002 † China, Yunnan, Lijiang
Streptacis regularis (FOSSIL) Pan & Erwin, 2002 † China, Guangxi, Heshan
Streptacis scalpta (FOSSIL) Knight, 1931 † USA, Missouri, Saint Louis
Streptacis subgracilis (FOSSIL) (Netschajew, 1894 †) Russia, Kirov, Sovetskiy rayon
Streptacis whitfieldi (FOSSIL) F.B. Meek, 1871 † USA, New Mexico, Taos
Jiangxispira yangouensis (FOSSIL) Pan & al., 2003 † China, Jiangxi