Observation 188744: Pluteus cinereofuscus group

When: 2014-11-15

Collection location: Serra de São Mamede, Portugal [Click for map]

Who: zaca

No specimen available

The strange of this observation is that the specimen grew on cow dung. I looked for information on what Pluteus spp. can develop in this habitat and found a work by A. Justo and ML: Castro, mentioning the existence of observations of possible specimens Pluteus atropungens on dung. The macroscopic description fits well in this issue, so is the proposed species; On the other hand, it is similar to my previous observations of P. salicinus.


Microscopy: Spores and Basidia;
Microscopy: Cheilocystidia;
Microscopy: Pleurocystidia;
Microscopy: Pileipellis;
Microscopy: Stiptipellis.

Proposed Names

60% (2)
Recognized by sight
70% (2)
Eye3 Eyes3
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Hi, Alfredo.
By: zaca
2014-11-21 14:15:24 PST (-0800)

I was looking at FAN Vol.2 about this group and it seems to be very difficult to separate between individual species in this group. I hoped that the habitat could furnish some hint, but from your comment I realise that this is hopeless.
Thanks for the help,

cinereofuscus group
By: Alfredo Justo (Fredo)
2014-11-21 06:56:00 PST (-0800)

based on the aspect/colors of the cap and stipe I think this belongs in the Pluteus cinereofuscus group. A second possibility is Pluteus nanus sensu lato.

The habitat on dung is certainly unusual for a Pluteus, but many species of section Celluloderma can be found growing terrestrially, without apparent connection to wood or wood remnants. This might be feeding on any relatively intact plant matter that is still on the dung.

Dear Alfredo,
By: zaca
2014-11-20 13:54:37 PST (-0800)

I appreciated your comment, very clear as usual.
I already uploaded a set of photos from the microscopy; Certainly you will apologize the bad quality of them; I have done it in a hurry just to try to confirm your thesis; If necessary I will repeat it later.
Do you have any further information about Pluteus spp. that can grow on dung?
Kind regards,

By: Alfredo Justo (Fredo)
2014-11-20 10:31:43 PST (-0800)

Very interesting observation Zaca

After we obtained molecular data we concluded that Pluteus atropungens is actually a synonym of Pluteus atromarginatus and that is not what you have here.

If you still have the specimens check the pileipellis under the microscope, I think you have a species from section Celluloderma

Created: 2014-11-16 14:04:11 PST (-0800)
Last modified: 2014-11-21 14:07:21 PST (-0800)
Viewed: 75 times, last viewed: 2017-12-02 15:06:51 PST (-0800)
Show Log