Bock, P. (2021). World List of Bryozoa.
Umbonula patens (Smitt, 1868). Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021) European Register of Marine Species at: http://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=156492 on 2022-08-18