Bamber, R.N.; El Nagar, A.; Arango, C.P. (Eds) (2024). Pycnobase: World Pycnogonida Database.
Nymphon gracile Schimkewitsch, 1890. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024) European Register of Marine Species at: https://www.marbef.org/data./aphia.php?p=taxdetails&id=379197 on 2024-03-29
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024). European Register of Marine Species.
Nymphon gracile Schimkewitsch, 1890. Accessed at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=379197 on 2024-03-29