Polymastia boletiformis. Site: W Church Bay, Rathlin Island
 Polymastia boletiformis. Event number: 19850904/03. Site: W Church Bay, Rathlin Island. 1985-09-04. Photograph © Christine Howson. (5/13) 
 Christine Howson (2026). Photograph of Polymastia boletiformis. Site: W Church Bay, Rathlin Island. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_12862.jpg. Accessed on 2026-11-04