Jäderholm, E. 1903. Aussereuropäische Hydroiden im schwedischen Reichsmuseum. - Arkiv for Zoologi 1: 259-312, pls 12-15., available online athttps://www.biodiversitylibrary.org/page/6622275 page(s): 276, pl. 12 figs 7-8 [details]
Schuchert, P. (2024). World Hydrozoa Database. Zygophylax operculata Jäderholm, 1903. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=843575 on 2024-05-02
original descriptionJäderholm, E. 1903. Aussereuropäische Hydroiden im schwedischen Reichsmuseum. - Arkiv for Zoologi 1: 259-312, pls 12-15., available online athttps://www.biodiversitylibrary.org/page/6622275 page(s): 276, pl. 12 figs 7-8 [details]
Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality