Friable volval sac was buried about 2" beneath surface, and was vitually impossible to extract. White remnamts were noted.


Proposed Names

82% (1)
Based on chemical features: This collection is the one on which the provisional name is based.

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= Observer’s choice
= Current consensus


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By: Dave W (Dave W)
2017-04-11 11:07:59 PDT (-0700)


A web page has been started for this species.
By: R. E. Tulloss (ret)
2017-04-11 10:43:03 PDT (-0700)
I didn’t record the types of trees nearby.
By: Dave W (Dave W)
2017-04-11 10:36:46 PDT (-0700)

This mushroom was found in the area near the southwest shore of the Pikes Creek Reservoir, not far from Route 29, as seen in the linked map.
The forest mainly consists of mature trees, well mixed; oak, ash, hemlock, white pine, and maybe shagbark hickory here and there. Composition changes from spot to spot, with a few patches of woods dominated by white pine. But oaks are present just about anywhere in this area.

Hello, David. I don’t seem to have any tree data for the collecting site.
By: R. E. Tulloss (ret)
2017-04-11 07:52:38 PDT (-0700)

Can you help on that?

Very best,


Thanks for sharing, Rod.
By: Dave W (Dave W)
2017-04-10 16:06:05 PDT (-0700)

Nice name. The disc does have a rather engaging/hypnotic quality.

The name is composed of two nouns in apposition—-hence, they are in the nominative.
By: R. E. Tulloss (ret)
2017-04-10 15:36:53 PDT (-0700)

The original words are Greek. The word “omma” means “eye.” The word “glenos” means “something at which you stare” or “a wonder”. The name is chosen for the eye-like appearance of the cap when viewed from above (not uncommon among species of section Vaginatae) and the sense of wonder at finding still another species in the __penetratrix_ grouping.

Very best,


I took a break from the tedious and annoying tax stuff and looked at the nrLSU
By: R. E. Tulloss (ret)
2017-04-02 20:49:51 PDT (-0700)

data that I got from Linas. We got a very good sequence that supports the idea that we have a species from the “__penetratrix__group.” As before, it appears we may indeed have a distinct species. I worked on possible names for hours today. I apparently am not in a sufficiently creative state of mind.

Thanks for the additional images, David.

I will give this species some more time at the ghosts of 2016 fade away.

Very best,


I added a few photos.
By: Dave W (Dave W)
2017-04-02 16:52:35 PDT (-0700)

Also, I changed the location for the observation; to be more specific.

The broad thick umbo and the deeply buried stipe are traits associated with the name “penetratrix”.

At least it’s not a JAR… just another rhacopus :-)

Q for spores seems to vary quite a bit. I wonder if the ones that appear to be globose look like this in account of a head-on profile? Accounting for the inaccuracy of the measurements as indicated by the reticle (add 17% by my own estimate) the lengths of a few of the spores in the photo exceed 13 mu.

Igor, this is the species we’ve discussed in recent days.
By: R. E. Tulloss (ret)
2017-04-02 09:34:40 PDT (-0700)


It does seem distinctive. But this is still the first evening spent with the new…
By: R. E. Tulloss (ret)
2017-03-21 21:19:53 PDT (-0700)

batch of DNA. I think I should give it another look tomorrow. The species is quite striking. Isn’t it?

I’ve kidded David (every once in a while) about the preponderance of rhacopus that is produced in Luzerne County. It seems there are other Vaginatae as well. And this one is extraordinary.

Very best,


By: I. G. Safonov (IGSafonov)
2017-03-21 20:34:56 PDT (-0700)

Do you have enough data to generate a cryptonomen temporarium for this species at this time?

We have DNA from this material now. It is a new species.
By: R. E. Tulloss (ret)
2017-03-21 20:09:50 PDT (-0700)

It has the TCT… initial string on the nrLSU gene (hence, it is in the provisional series “Penetratrices”). I’ve just got the nrLSU sequence so far. It is genetically distant from just about everything in the Vaginatae (where it appears to belong). Of course, with the unusual “left hand end” of nrLSU, its best matches are to a few species of the Penetratrices group such as sp-AUS09, sp-AUS11, and insinuans.

More sometime soon.

Thanks for this cool material.

Very best,


Thanks Dave,
By: groundhog
2013-08-14 08:54:19 PDT (-0700)

This material has been accessioned to Rod’s herbarium.