Observation 164304: Ganoderma megaloma (Lév.) Bres.

When: 2014-04-27

Collection location: High Rock Park, Staten Island, Richmond Co., New York, USA [Click for map]

40.5812° -74.1235°

Who: Joseph D. Cohen (Joseph D. Cohen)

No specimen available

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Matthew Schink (MSchink)
2014-12-09 18:38:51 GMT (+0000)

I guess we can assume it does not apply to the Pacific northwest then.

Three problems *edit
By: Erlon (Herbert Baker)
2014-12-09 18:34:08 GMT (+0000)

Ganoderma annulare (Fr.) Gilb. is an illegitimate combination that was originally described from Java. Ganoderma annulare (Lloyd) Boedijn is a legit taxon from South Africa. Mycotaxon has Ganoderma australe (Fr.) Pat. as the correct name for Ganoderma annulare (Lloyd) Boedijn but G. australe is from the Pacific islands.

By: Matthew Schink (MSchink)
2014-12-09 18:08:57 GMT (+0000)

One of the descriptions for G.annulare mentioned it only being known from California, I did not find where the type location was, though admittly did not look very hard.

Ganoderma megaloma
By: Erlon (Herbert Baker)
2014-12-09 17:55:36 GMT (+0000)

G. megaloma can be distinguished by its whitish colors and the small poreless band at the edge of the pore surface. I’m not sure G. annulare occurs in the west because that species is from Java. G. brownii is a common look alike out west. G. megaloma probably has a wider distribution than just the east coast and it would not surprise me to find it in the PNW.

It could be
By: Matthew Schink (MSchink)
2014-12-09 16:57:18 GMT (+0000)

Either Ganoderma brownii or Ganoderma annulare. I am not all too familiar with the non laccate species of Ganoderma on the West coast, so I am unable to tell you what distinguishes those species.

Thanks for explaining.
By: Joseph D. Cohen (Joseph D. Cohen)
2014-12-09 16:43:11 GMT (+0000)


Thank you for the explanation.

Do you know what species matches what we call “Ganderma applanatum” in the Pacitic Northwest?

— Joe

I am not entirely clear
By: Matthew Schink (MSchink)
2014-12-09 15:47:08 GMT (+0000)

On the taxonomy of Ganoderma applanatum and its close relatives, but it is likely that Ganoderma applanatum from Europe, where it was described is a distinct species from the North American variety, if this is true then G.megaloma fits with specimens matching this form from Eastern North America.

Why G. megaloma?
By: Joseph D. Cohen (Joseph D. Cohen)
2014-12-09 15:14:58 GMT (+0000)


When I look at the nomenclature databases, they say that Ganoderma applanatum (Pers.) Pat., and Ganoderma megaloma (Lév.) Bres. are both “legitimate” names, and — if I’m interpreting the search results correctly — they are names for the same taxon.

Is that correct?

And if so, shouldn’t G. applanatum (1887) have priority over G. megaloma (1912). See, e.g., http://www.speciesfungorum.org/...

Can you point me the right way?

— Joe

Created: 2014-04-28 20:37:43 BST (+0100)
Last modified: 2018-05-31 15:52:11 BST (+0100)
Viewed: 342 times, last viewed: 2018-11-07 11:46:24 GMT (+0000)
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