Observation 136393: Amanita coprinopsoides Tulloss nom. prov.
When: 2013-06-07

Notes: These were growing in mixed woods.
Caps up to 5.6 cm across with striations up to 9mm long.
Cap color seemed to have a slight greenish tint.
Spores were ~ 9.0-12.0 X 8.0-10.1 microns.
Q(ave) = 1.19. Q(range) = 1.11-1.29.
Closest match that I could find on Rod’s regional checklist was sp-T33.

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Yeah, I’m holding my total commitment to coprinopsoides in reserve.
By: R. E. Tulloss (ret)
2017-03-21 18:50:46 CDT (-0400)

I hope that another specimen will show up.

Very best,


Thanks Rod, I’m not sure
By: Ron Pastorino (Ronpast)
2017-03-21 18:23:22 CDT (-0400)

about the darkening with age but based on the photos, the disc does seem to darken and get larger with age.
It appears close to your A. coprinopsoides with the long deep striations.

The nrLSU is identical to that of coprinopsoides.
By: R. E. Tulloss (ret)
2017-03-21 17:45:56 CDT (-0400)

In both cases the readable part of the nrITS sequence is the first 58 characters or nrLSU, a strongly conserved (rarely varying) sequence segment. Consequently, the 58 character sequence itself is not a demonstration of similarity between the two collections (the present material and the original collection called coprinopsoides). However, the limitation of a readable part of the nrITS read attempts to the region immediately following the nrITS proper may be a characteristic that could be checked again in future material that suggests coprinopsoides.

Very best,


Do you think this species darkens with age?
By: R. E. Tulloss (ret)
2017-03-21 17:27:04 CDT (-0400)


We failed to get an nrITS sequence.
By: R. E. Tulloss (ret)
2017-03-21 17:26:21 CDT (-0400)


We have received DNA from this material. More soon.
By: R. E. Tulloss (ret)
2017-03-21 17:22:57 CDT (-0400)


Material received.
By: R. E. Tulloss (ret)
2013-06-21 07:12:24 CDT (-0400)

Thank you again, Ron.

The material has been received in good order and is being accessioned.

Very best,


Thank you, Ron.
By: R. E. Tulloss (ret)
2013-06-14 23:09:54 CDT (-0400)


Thanks Rod, sp-T16 does also look
By: Ron Pastorino (Ronpast)
2013-06-14 22:07:24 CDT (-0400)

like a possibility.
I’ll send them in a couple of days.

By: R. E. Tulloss (ret)
2013-06-14 21:22:12 CDT (-0400)

Thanks for posting this observation with the micro detail.

For persons not familiar with the regional checklist to which Ron refers, it can be found here:


I think there are a couple of other possibilities for an ID because of spore size variation and the small samples sizes for spores measurements of some taxa in the thecklist.

I’m very interested in the species of sect. Vaginatae so I tried to get some data on as many apparently different species as possible; however, I haven’t been able collect enough data to bring the sample sizes up to where I would prefer to have them.

I think that sp-V01 and sp-T16 might also be possibilities in addition to sp-T33. The macroscopic appearance of sp-T16 is especially similar to the appearance of the mushrooms in your photos.

I’d very much like to see your material if that’s possible.

very best,


Created: 2013-06-14 17:21:17 CDT (-0400)
Last modified: 2017-03-21 18:49:28 CDT (-0400)
Viewed: 87 times, last viewed: 2017-06-16 03:18:31 CDT (-0400)
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