Observation 120407: Amanita muscaria var. formosa sensu Thiers

When: 2012-12-15

Collection location: Vancouver, Clark Co., Washington, USA [Click for map]

Who: Modified Hypothesis (Modified Hypothesis )

No specimen available

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Erlon (Herbert Baker)
2013-06-18 15:12:26 PDT (-0700)

Yes, the western, solid cream yellow colored fly-agaric represented by Clade II/A, is part of the european clade; it is distinct enough to qualify for species status; it just hasn’t been renamed yet. Its yellow color is more of a cream yellow and is never as brightly yellow as the eastern taxon A. muscaria var. guessowii.

The western A. muscaria subsp. flavovolvata can fade from a solid red to an orange-yellow color as it matures; it does not start out and stay yellow like the former species however. This currently named sub-species should be raised to species rank. Rod Tulloss has suggested the name A. amerimuscaria nom. prov. for this mushroom because he believes the cap colors are polymorphic in the western entity; I kindly disagree with this view-point.

The eastern A. muscaria var. guessowii is part of the A. muscaria subsp. flavolvata clade; it can show some red and peach tones in some specimens, but is usually bright yellow or yellow-orange. When it does occur appearing reddish the color is never as quit as deep red as the western counterpart. Since this species appears to be at least partially geographically disjunct from the western entity and also has several different phenotypical features including both macromorphological and micromorphological characteristics that are distinct; this would meet the criteria for raising it to subspecies rank (even if it can interbreed with the western taxon).

When considering species names(which are essentially arbitrary to begin with)it is important to take all information into consideration, and not isolate species based on a few segments of just DNA. The sub-species rank is an important and unique rank which should probably be used more often in ranking system, as it applies to mycology, than it presently is.

so in other words
By: Modified Hypothesis (Modified Hypothesis )
2013-06-17 15:50:53 PDT (-0700)

your saying that the European ones are more related to the PNW ones then the ones on the east coast ?

if you look thru my pictures whats your opinion on that ones that look identical other then the fact ones red and ones yellow that were growing next to each other. I think it might be more of a phenotype thing then a sub species but im just beginner biologist


i would totally agree that the one in the link and this one here are two different sub species they had rather different morphology similar to how percisina and guessowii are different on the east coast

sensu Thiers
By: Erlon (Herbert Baker)
2013-06-17 11:28:25 PDT (-0700)

Only in the sense of the mycologist Harry D. Thiers’ description of the northwest solid yellow taxon. It is not conspecific with the European entity of the same name. A. muscaria var. formosa sensu Thiers is the solid yellow PNW variant represented by clade II/A in Geml’s cladogram

By: Modified Hypothesis (Modified Hypothesis )
2013-06-17 09:18:40 PDT (-0700)

is formosa now including american species ?

Created: 2012-12-18 14:20:31 PST (-0800)
Last modified: 2013-06-16 11:06:17 PDT (-0700)
Viewed: 94 times, last viewed: 2017-06-14 12:06:05 PDT (-0700)
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