Kroh, A.; Mooi, R. (2021). World Echinoidea Database.
Echinosigra Mortensen, 1907. Accessed through: RAS (Eds.) (2021) Register of Antarctic Species at: http://ras.biodiversity.aq/aphia.php?p=taxdetails&id=123407 on 2024-03-29
RAS (Eds.) (2024). Register of Antarctic Species.
Echinosigra Mortensen, 1907. Accessed at: https://ras.biodiversity.aq/aphia.php?p=taxdetails&id=123407 on 2024-03-29