Note: See Note to Spongites [p. 270].
Melobesia farinosa Lamouroux forma borealis Foslie, 1905b: 96 (type locality: Roundstone, Ireland fide Chamberlain, 1994b: 116).
Hydrolithon boreale (Foslie) Chamberlain, 1994b: 116–120 (including Indian Ocean records).
INDIAN OCEAN DISTRIBUTION: Australia, Persian Gulf.