Actinothoe sphyrodeta, Calliostoma zizyphinum. Site: Skullmartin Rock, Ballywalter
 Actinothoe sphyrodeta, Calliostoma zizyphinum. Event number: 19820917/03. Site: Skullmartin Rock, Ballywalter. 1982-09-17. Photograph © David Connor. (6/9) 
 David Connor (2026). Photograph of Actinothoe sphyrodeta, Calliostoma zizyphinum. Site: Skullmartin Rock, Ballywalter. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0995.jpg. Accessed on 2026-11-04