Bock, P. (2025). World List of Bryozoa. Steginoporella firma (Canu, 1907) †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1413871 on 2026-05-01
Marine Species Traits editorial board (2026). Marine Species Traits. Steginoporella firma (Canu, 1907) †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1413871 on 2026-05-01