Polymastia boletiformis, Securiflustra securifrons. Site: E of Doon Point, Rathlin Is
 Polymastia boletiformis, Securiflustra securifrons. Event number: 19830607/01. Site: E of Doon Point, Rathlin Is. 1983-06-07. Photograph © Christine Howson. (5/16) 
 Christine Howson (2026). Photograph of Polymastia boletiformis, Securiflustra securifrons. Site: E of Doon Point, Rathlin Is. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2021.jpg. Accessed on 2026-11-04