Seen at the Cuajimoloyas fungus fair.


With KOH

Proposed Names

94% (3)
Based on chemical features: Very close ITS match with several other C. caperatus sequences in GenBank

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
I am content with the DNA results
By: Emma Harrower (eharrower)
2017-04-26 23:02:00 BST (+0100)

I think that the deep color of the cap may just be individual variation. And I wonder if anyone has done any studies on the effect of solar radiation on cap-color. I know that some fungi have more melanin than others. I wonder if mushrooms closer to the equator are darker than their northern counterparts.

please define “very close” for the audience at home!
By: Debbie Viess (amanitarita)
2017-04-26 21:10:22 BST (+0100)

and some micrographs still wouldn’t hurt!

GenBank KY867551
By: Alan Rockefeller (Alan Rockefeller)
2017-04-26 20:56:43 BST (+0100)
speciation and cryptic species
By: Debbie Viess (amanitarita)
2017-04-03 16:30:37 BST (+0100)

DNA is not always sufficient to separate species, altho clearly this is closely related to caperatus.

Why not check and micrograph those spores and the cap cuticle, too, as per Emma’s request? I looked for “purplish” gills in younger specimens displayed here, and couldn’t find good examples. I did manage to see a bit of a lilac tinge to the farthest R fb in this photo by Alan, but could just be a trick of the light:

Or, perhaps this is something not yet described, not deeply examined since it was a pretty close match to something that we know well, or at least think that we know well.

The oddly dark cap and the KOH rxn. say that this might well be something different.

To “balance” your ID, best to have a three legged support. If one or two methodologies (macro and chemical) suggest it is not, you will need more than just a rather close DNA match to know for sure.

Do the locals eat this one, Alan?

These photos are a bit on the dark side
By: Alan Rockefeller (Alan Rockefeller)
2017-04-03 02:52:37 BST (+0100)

Here is a photo of the same species that shows a lighter cap color:

Three more observations of the same species:

Not arguing with the DNA, but…
By: I. G. Safonov (IGSafonov)
2017-04-03 02:03:53 BST (+0100)

…the caps of this Mexican collection look very dark in comparison to the East Coast and European “gypsies”. I am very familiar with the mushroom (common in the NJ Pine Barrens where it grows with pine and blueberry in the fall and sometimes in springtime), and it has a very distinctive look about it – one can ID it just by the appearance of the cap. That’s why if I were shown only the caps, I would have never guessed these were C. caperatus. Maybe a species complex/‘group’ was not an unreasonable suggestion after all…

ITS sequence
By: Alan Rockefeller (Alan Rockefeller)
2017-04-03 01:29:57 BST (+0100)


thanks again Emma.
By: Debbie Viess (amanitarita)
2016-08-02 19:54:31 BST (+0100)

always nice to have a cort expert weigh in here.

I am reading…
By: Emma Harrower (eharrower)
2016-08-02 19:22:19 BST (+0100)

KOH negative on stipe, positive (red) on cap? Am I right? I am not finding any Rozites or Descolea that has a positive KOH reaction. As for ID, I came across Cortinarius colombianus, which is a C. caperatus that has purple gills. I definitely say sequence this one and look at the spores and look at the cuticle. Cool find!

why “group?”
By: Debbie Viess (amanitarita)
2016-08-02 16:36:24 BST (+0100)

is there evidence of cryptic species within the caperatus concept?

Created: 2016-08-02 07:16:16 BST (+0100)
Last modified: 2018-05-05 18:39:56 BST (+0100)
Viewed: 164 times, last viewed: 2019-12-11 11:53:24 GMT (+0000)
Show Log