Mah, C.L. (2021). World Asteroidea Database.
Ripaster longispinus Koehler, 1920. Accessed through: RAS (Eds.) (2021) Register of Antarctic Species at: http://ras.biodiversity.aq/aphia.php?p=taxdetails&id=235018 on 2026-02-20
RAS (Eds.) (2026). Register of Antarctic Species.
Ripaster longispinus Koehler, 1920. Accessed at: https://ras.biodiversity.aq/aphia.php/10.1080/rest/aphia.php?p=taxdetails&id=235018 on 2026-02-20