Pachymatisma johnstonia. Site: E of Sheep Is, Ballintoy
 Pachymatisma johnstonia. Event number: 19830519/07. Site: E of Sheep Is, Ballintoy. 1983-05-19. Photograph © Bernard Picton. (5/6) 
 Bernard Picton (2026). Photograph of Pachymatisma johnstonia. Site: E of Sheep Is, Ballintoy. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_1777.jpg. Accessed on 2026-11-04