Polymastia boletiformis, Securiflustra securifrons, Cellaria sinuosa. Site: Broad Sound, Skerries, Portrush
 Polymastia boletiformis, Securiflustra securifrons, Cellaria sinuosa. Event number: 19820809/03. Site: Broad Sound, Skerries, Portrush. 1982-08-09. Photograph © Bernard Picton. (14/19) 
 Bernard Picton (2026). Photograph of Polymastia boletiformis, Securiflustra securifrons, Cellaria sinuosa. Site: Broad Sound, Skerries, Portrush. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0710.jpg. Accessed on 2026-11-04