Oncousoeciidae Canu, 1918
Oncousoecia abrupta Osburn, 1953
Oncousoecia arcuata Canu & Bassler, 1928
Oncousoecia canadensis Osburn, 1933
Oncousoecia diastoporides (Norman, 1869)
Oncousoecia diastroporides (Norman, 1869)
Oncousoecia dilatans (Johnston, 1847)
Oncousoecia lobulata Canu, 1918
Oncousoecia narediensis
Oncousoecia occulta (Harmelin, 1976)
Oncousoecia ovoidea Osburn, 1953
Oncousoecia polygonales (Kluge, 1915)
Oncousoecia polygonalis (Kluge, 1915)
Oncousoecia robusta Canu & Bassler, 1928
