Observation 129261: Otidea mirabilis Bolognini & Jamoni

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Gerhard Koller (Gerhard)
2013-06-30 08:06:05 CDT (-0500)

Maybe if it is something real weird. It is also a matter of patience and time for me given that I am so often on forays and all.
I will try but I cannot promise. The few pics I’ve taken so far were – to say it openly – a very nuisance for me. To get one of those pics below took me at least twenty tries and it simply is enervating.

By: Danny Newman (myxomop)
2013-06-29 23:28:02 CDT (-0500)

these micrographs could be great if you only played around a bit with the interocular distance between the end of your camera’s lens and the eyepiece through which you are shooting. Add some zoom, and you should have no problem filling the frame with what you’re seeing under the scope. I, for one, would be thrilled to have your many interesting observations begin to be accompanied by micrographs. that reality does not at all seem out of reach.

I have done another scope work on this
By: Gerhard Koller (Gerhard)
2013-03-01 10:45:36 CST (-0600)

and there is no colored hyphae anywhere, excipulum all hyaline.

By: Gerhard Koller (Gerhard)
2013-03-01 05:05:27 CST (-0600)

I haven’t seen any colored structures anywhere in the fruitbody. But I will do another slide.

Thanks a lot Nicolas
By: Irene Andersson (irenea)
2013-03-01 04:56:43 CST (-0600)

More microscopy to do :-)

I’m right with this determination but…
By: Nicolas VAN VOOREN (NicoV)
2013-03-01 01:45:49 CST (-0600)

O. mirabilis is probably the name to apply to this collection. The purplish tinges are really visible under artificial light (like a flash), this is why it often appears more violet on photos than in natural exposure.
This species is close to O. bufonia and they share the same spore shape that is to say navicular. The main feature to distinguish these two species concerns the hyphae of medullar excipulum which are totally hyaline in O. mirabilis, in O. bufonia you can see colored hyphae (it looks like finger-prints). The ecology is also a good character.

I think it is it.
By: Gerhard Koller (Gerhard)
2013-02-26 14:21:19 CST (-0600)

Just received the photos from the friend who was with me during the foray. His clearly have the same blue tinge but the photos are in their natural color. So this is first find for Austria then. Very good :)

By: Irene Andersson (irenea)
2013-02-26 13:59:17 CST (-0600)

why not “I call it that”..

By: Irene Andersson (irenea)
2013-02-26 13:53:09 CST (-0600)

perfect spore shape for mirabilis. I’ll raise my vote to “Promising” :-)

I have added
By: Gerhard Koller (Gerhard)
2013-02-26 12:54:18 CST (-0600)

some very bad micro photos.
Paraphyses are not branched and not notably enlarged at the tip.
Spores 14-14,5-6.
Form of the spores seem to fit.

Very few Otidea species
By: Irene Andersson (irenea)
2013-02-26 09:39:52 CST (-0600)

have the the same spore shape (cylindric, oblong) as alutacea. In mirabilis they should be more spindle-shaped.
If you have a camera and a microscope, why not take a photo of the spores?
Just aim and shoot close above the eyepiece..
Then we can all compare with this:

I agree that you have too much blue in some of the pictures, the first two in particular. Even if dark surfaces often show extra blue by reflection from the sky, the blue is still there. Also, the yellowish brown hymenium is a better match with mirabilis than with alutacea which is more greyish brown.

By: Gerhard Koller (Gerhard)
2013-02-26 06:14:49 CST (-0600)

what if my photos are violettish tinged?
I have been to Vienna yesterday and someone said that the photos could be too lilac and not showing the natural color of the mushroom.
What is the safest distinguishing feature between mirabilis and alutacea besides the spores which are pretty the same?

Yes, I’ve compared all photos available.
By: Gerhard Koller (Gerhard)
2013-02-23 13:40:29 CST (-0600)

I will bring my exsiccatum to Vienna on Monday to see what they think about it. I will get to preserve a duplicate at the university. As it looks it is first find for Austria but then that doesn’t say much since there are not many people dealing with Otidea and the like.

Don’t forget
By: Irene Andersson (irenea)
2013-02-23 13:29:53 CST (-0600)

zaca’s portugese obs…
These three look good together, don’t they?

Did scoping today,
By: Gerhard Koller (Gerhard)
2013-02-23 13:06:18 CST (-0600)

spore size and form do indeed fit for O. mirabilis!
But in database of fungi of Austria there is no find of it. And I am not trained enough to decide. Besides the dried material is not fully representative, is it? I should check for fresh fruitbodies this fall I guess.
What is the known distribution? I found Italy, Czech, Slovak, Poland and Sweden in the net.

The colours
By: Irene Andersson (irenea)
2013-02-22 12:42:52 CST (-0600)

rule out alutacea at once. There may be others with this yellowish brown hymenium and violet outside, that’s why my choice of “Could be”.

Never heard of.
By: Gerhard Koller (Gerhard)
2013-02-22 11:57:13 CST (-0600)

Have no recent key for Otidea.
How can they be distinguished?

Created: 2013-02-22 10:47:33 CST (-0600)
Last modified: 2013-03-01 01:31:02 CST (-0600)
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