Name: Oligoporus leucospongia
Author: (Cooke & Harkn.) Gilb. & Ryvarden
Citation: (Cooke & Harkn.) Gilb. & Ryvarden 1985
There are some fairly complicated nomenclatural and taxonomic issues around this species. Whether Postia leucospongia, Oligoporus leucospongia, or Spongiporus leucospongia is correct depend on two issues. First, whether Postia is accepted as validly published – it is an older generic name than Oligoporus, but there is some controversy over the validity of the publication of Postia. If it is not valid, Oligoporus takes priority. I believe most current mycologists who have looked into the issue accept the valid publication of Postia, but the issue remains unresolved.
Second, based on work by Niemelä (cited in Spirin, et al), another strategy is to divide the group into Postia, Oligoporus, Spongiporus, and several other genera. If this strategy is adopted, Spongiporus leucospongia would be the proper name for this species.
I’m using “Oligoporus leucospongia”, as of the three valid names for this species, this is the most common in the literature.
Sources (Oligoporus vs Postia vs Spongiporus):
Walker J. 1996. An opinion on the validity of the generic name Postia Fries 1874 (Eumycota: Aphyllophorales). Australasian Mycological Newsletter 15(2):23–26.
Spirin WA, Zmitrovich IV, Wasser SP. 2006. Oligoporus balsameus: rare Eurasian species plus notes on some related taxa. Mycotaxon 97:73–82.
The separation between Tyromyces and Oligoporus, Postia, Spongiporus, etc, however, is justified in terms of both molecular phylogeny and ecophysiology. Tyromyces, which is restricted to Tyromyces chioneus (and perhaps a few close allies), is a white rot fungus that is phylogenetically distant from the other genera, which are all brown rotters and well ensconced in a brown rotter clade. Therefore, Tyromyces leucospongia is clearly not valid on taxonomic grounds and should be treated as a deprecated synonym.
Sources (Tyromyces vs others):
Yao YJ, Pegler DN, Chase MW. 1999. Application of ITS (nrDNA) sequences in the phylogenetic study of Tyromyces s.l. Mycological Research 103:219–229.
Hibbet DS, Donoghue MJ. 2001. Analysis of character correlations among wood decay mechanisms, mating systems, and substrate ranges in Homobasidiomycetes. Systematic Biology 50:215–242.
Key to the group:
Jülich, W. (1982). Notes on Some Basidiomycetes (Aphyllophoralles and Heterobasidiomycetes). Persoonia 11(4): 421-428.
Tyromyces leucospongia (Cooke & Harkn.) Bondartsev & Singer, Annls mycol. 39(1): 52 (1941)
Leptoporus leucospongia (Cooke & Harkn.) Pilát, in Kavina & Pilát, Atlas Champ. l’Europe (Praha) 3: 239 (1938)
Oligoporus leucospongia (Cooke & Harkn.) Gilb. & Ryvarden, Mycotaxon 22(2): 365 (1985)
Polyporus leucospongia Cooke, Grevillea 11(no. 59): 106 (1883)
Postia leucospongia (Cooke & Harkn.) Jülich, Persoonia 11(4): 423 (1982)
Spongipellis leucospongia (Cooke & Harkn.) Pat., Essai Tax. Hyménomyc. (Lons-le-Saunier): 84 (1900)
Spongiporus leucospongia (Cooke & Harkn.) Murrill, Bull. Torrey bot. Club 32(9): 474 (1905)
Created: 2007-05-24 21:08:13 CDT (-0400) by Douglas Smith (douglas)
Last modified: 2013-02-15 12:47:43 CST (-0500) by walt sturgeon (Mycowalt)
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