World Register of Marine Species (WoRMS)
Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira da Rocha, R.; Swalla, B.J.; Turon, X. (2026). Ascidiacea World Database. Pyura michaelseni (Oka, 1906). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=253737 on 2026-08-04
Oka, A. (1906). Notizen uber japanische ascidien, 1. Annot. Zool. Japonenses. 6: 37-52.