References
Tetrasporangium in a conceptacle. © R Walker
Irvine, L M and Johansen, H W 1994. Corallinoideae. In Irvine, L M and Chamberlain, Y M [Eds.] Seaweeds of the British Isles: Vol.1 Rhodophyta Pt. 2B. Corallinales, Hildenbrandiales, HMSO, London.
Walker, R H, Brodie J, Russell, S and Irvine, L M (2009). The taxonomy and biodiversity of geniculate coralline algae in the northeastern Atlantic: Corallina caespitosa sp. nov. (Corallinoideae, Rhodophyta). Journal of Phycology 45: 287-297.