Type species: Alecto major Johnston, 1847
This genus includes the species:
| (Harmelin, 1976) | Recent | Mediterranean | WoRMS 111677 | |
| (Busk, 1852) | Recent | Australia | WoRMS 470747 | |
| Taylor & McKinney, 2006 | Late Cretaceous Maastrichtian | USA Alabama | WoRMS 1399751 | |
| (Canu & Bassler, 1929) | Recent | West Pacific Philippines | WoRMS 885820 | |
| (Johnston, 1847) | Recent | Europe | WoRMS 111679 | |
| (d'Orbigny, 1852) | Neogene Miocene | Austria | WoRMS 1409926 | |
| (Busk, 1875) | Recent | N. Atlantic, Mediterranean | WoRMS 111680 |
Annectocyma major at Bryozoa of the British Isles site.
Annectocyma arcuata? page at NMITA ( Annectocyma arcuata (Canu & Bassler, 1929): not A. arcuata Harmelin 1976. The former species is provisionally maintained here as Oncousoecia arcuata)