Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira da Rocha, R.; Swalla, B.J.; Turon, X. (2024). Ascidiacea World Database.
Circinalium pachydermatinum Jacobson, 1892. Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=252569 on 2024-05-06