Polymastia boletiformis. Site: Altacarry Head, Rathlin Island
 Polymastia boletiformis. Event number: 19840810/01. Site: Altacarry Head, Rathlin Island. 1984-08-10. Photograph © Bernard Picton. (8/16) 
 Bernard Picton (2026). Photograph of Polymastia boletiformis. Site: Altacarry Head, Rathlin Island. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_8584.jpg. Accessed on 2026-11-04