Observation 160076: Amanita gemmata group
When: 2014-02-20
No herbarium specimen

Notes: Found under Pine. Need help identifying please. Possible gemmata group?

Images

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Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Try the nrLSU gene for sp-N60.
By: R. E. Tulloss (ret)
2015-01-22 18:54:59 PST (-0800)

You’ll see that A. breckonii is a tight match with nrLSU also. It is possible, however, that the nrLSU of sp-N60 also will require bacterial cloning; and, at present, I don’t have access to the necessary skill base. Looking hard.

I collected, thanks to Dr. Roy Halling, for 15 days in Costa Rica. During that time I was fooled several times in the field by yellow-capped taxa that I thought at first might be xylinivolva. The InBio picture looks like one of those entities. I would say that during that one visit, the __xylinivolva_-NOT material was much more common than the true xylinivolva. We didn’t see it every year in the Chiricahua Mycoflora Project (my Arizona experience) either. I think the pictures I have from Arizona are the best that I’ve been able to gather together…so far.

Have to sign off for the weekend.

Very best,

Rod

Interesting…
By: Erlon (Herbert Baker)
2015-01-22 18:18:09 PST (-0800)

What do you think of this collection of A. xylinivolva from Costa Rica? http://www.inbio.ac.cr/...

I have noticed in Amanita “sp-N60” that the cap color can vary from citron-moderate yellow, to pale pink or grey-pink, to moderately orangish buff, to pale grey or brownish in age or upon drying.

I’m looking forward to more dna to play with.

Nice sleuthing.
By: R. E. Tulloss (ret)
2015-01-22 18:10:33 PST (-0800)

I saw the Tennessee material and the notes say the cap was yellow. After brief examination of the collection, my impression was that the Tennessee material was A. praecox.

I have seen many, many collections of A. xylinivolva from Colombia to Arizona. It is a strikingly constant, rather intense yellow. In Arizona, it was larger than I expected, and it first struck me as a bright-colored species of the Phalloideae because of the size of the volval limb on the bulb and the persistent partial veil. I was pretty surprised when I got its spores under the scope in Melzer’s Reagent.

Amanita xylinivolva is quite distinct from praecox and from what is known of stranella.

I am hoping that we will have multiple DNA sequences of good quality within a few more months.

Very best,

Rod

Hi Rod
By: Erlon (Herbert Baker)
2015-01-22 17:18:22 PST (-0800)

I found this collection. http://www.bio.utk.edu/mycology/atbi/atbi_photosa-c.htm
A. xylinivolva, A. stranella, and Amanita “sp-N60”, appear to share the pink coloration.

Amanita stranella should be very similar to…
By: R. E. Tulloss (ret)
2015-01-22 17:14:22 PST (-0800)

A. praecox. I think the case might be made that the two taxa are taxonomic synonyms. They are both gracile and have a very weak and disappearing partial veil. I think the present taxon is proportionately (I don’t know its size) more robust than stranella.

I would be very happy if someone would contradict me in the following:

So far as I know there is only one remaining specimen of A. stranella that was in the hands of Snell prior to the publication of the name. Hence, there is only one existing candidate for lectotype of the species. A discussion of the situation is in the “discussion” data field of the technical tab of the following page:

http://www.amanitaceae.org?Amanita%20stranella

Very best,

Rod

Created: 2014-02-20 14:58:54 PST (-0800)
Last modified: 2016-10-26 08:31:52 PDT (-0700)
Viewed: 115 times, last viewed: 2016-11-11 15:04:17 PST (-0800)
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