Grantia foliacea Breitfuss 1898

Breitfuss provided only a very general locality ('Nordliches Eismeer'). In 1932, he translated that to 'Barentsmeer', and added some additional localities of the 'Helgoland' Expedition from around Spitsbergen.

Breitfuss (1898, 1932) referred to Montagu's (1814) description of Spongia foliacea as the basis for his species. Montagu's species is here accepted as junior synonym of Grantia compressa (Fabicius, 1780). Remarkably, Burton (1963: 444) assumed that Breitfuss was the author of the combination Grantia foliacea apparently overlooking that Breitfuss considered his specimens as conspecific with Montagu's. A further cmplication is that Montagu's Spongia foliacea is a junior homonym of Spongia foliacea Esper, 1797, q.v.