Pachymatisma johnstonia, Delesseria sanguinea. Site: NW of Derginan Point, Rathlin Is
 Pachymatisma johnstonia, Delesseria sanguinea. Event number: 19830609/03. Site: NW of Derginan Point, Rathlin Is. 1983-06-09. Photograph © David Erwin. (7/13) 
 David Erwin (2026). Photograph of Pachymatisma johnstonia, Delesseria sanguinea. Site: NW of Derginan Point, Rathlin Is. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2141.jpg. Accessed on 2026-11-04