Phymatolithon calcareum, Halurus flosculosus. Site: White Cliffs,  Rathlin Island
 Phymatolithon calcareum, Halurus flosculosus. Event number: 20190513/01. Site: White Cliffs, Rathlin Island. 2019-05-13. Photograph © Bernard Picton. (11/54) 
 Bernard Picton (2026). Photograph of Phymatolithon calcareum, Halurus flosculosus. Site: White Cliffs, Rathlin Island. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=_b197024.jpg. Accessed on 2026-11-04