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Orcadia is a genus of marine parasitic ascomycete fungi described in 1914 by Geo K. Sutherland,[1] classified initially as a member of the Hypocreales within the Pyrenomycetes.[2] Its taxonomic position is uncertain, although it is currently placed in the order Pezizales, in the class Pezizomycetes.[3]
Orcadia is characterized by an absence of stromata; perithecia entirely immersed in the thallus of their host through a long tapering beak; soft, white walls of perithecia that never become black; cylindrical or clavate asci, containing 8 septate spores; and the presence of paraphyses.[1]
The species O. ascophylli was originally described from the Orkney Islands (Scotland).[1] It is also common at Aberystwyth (Wales), where it parasites on old worn thalli of Ascophyllum nodosum.[4] The species O. pelvetiana is found in Orkney and Clare Island, where it parasites Pelvetia canaliculata.[2]
Orcadia is a genus of marine parasitic ascomycete fungi described in 1914 by Geo K. Sutherland, classified initially as a member of the Hypocreales within the Pyrenomycetes. Its taxonomic position is uncertain, although it is currently placed in the order Pezizales, in the class Pezizomycetes.
