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23-06-2025 13:25

Enrique Rubio Enrique Rubio

I would like to hear your opinion on this Scutelli

23-06-2025 04:03

Francois Guay Francois Guay

Hi, I found this tiny sulfur yellow asco growing o

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DirkW DirkW

Dear friends,anyone out there with this paper?:DOU

26-05-2025 18:09

Henk Remijn

Good day,In a burned forest near Hulst on the bord

21-06-2025 22:27

David Chapados David Chapados

Hi,Is this a Calycina? C. herbarum?Growing on an h

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

11-06-2025 16:26

Jason Karakehian Jason Karakehian

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18-06-2025 19:24

Bernard Declercq Bernard Declercq

Good evening,On Oenanthe aquatica we collected  a

17-06-2025 14:23

Josep Torres Josep Torres

Hello.A probable Hyaloscypha from last June 1st, s

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Ascobolus species
B Shelbourne, 14-09-2024 01:12
B Shelbourne• Ascobolus species on wild herbivore dung.
• Seem comparable to A. furfuraceus, but some of the species seem quite similar and I may have missed something.
• Any feedback appreciated.

Habitat: On sodden dung of a wild animal, seems like a small to medium size herbivorous mammal (possibly deer), in undergrowth, swampy area, mixed deciduous woodland, Low Weald, England, early September, after lots of rain.

Apothecia: Sulfureous colour at maturity (yellowish-greenish), diameter < ~3.5 mm, height < 1 (2) mm, initially whitish-translucent and pulvinate, then cupulate to discoid,sessile, superficial, crowded but mostly immature, receptacle initially more whitish and translucent, with uneven and granular appearance, disc appears more gelatinous and yellowish, plano-concave in maturity, margin distinct, round, and slightly crenulate, sometimes out-rolled, mature asci noticeably protruding with blackish spores.


Associate: Coprinopsis sp.


Asci: 330-350 x 28-31 um, 8-spored, operculate, cylindrical clavate, apex rounded when fully turgid, otherwise acute-truncate, obtusely biseriate when turgid, rarely with an unpigmented or deformed spore, mature asci protruding distinctly from the hymenium (detaching?).


Spores: 21-23 x 10-11.5 um, purple, ellipsoid, ornamentation of longitudinal crevices, often anastomising, sometimes mostly parallel and other times forming an irregular reticulum, with a hyaline sheath often seen as globose attachment.


Paraphyses: Slightly inflated to distinctly capitate at apex, apparently hyaline.


Exudate: In upper part of the the hymenium (epithecium), thick, yellow, gel-like, on margin and surface of the excipulum more brownish and granular.


Ectal excipulum: Textura globosa.

  • message #80160
  • message #80160
Michel Delpont, 14-09-2024 09:34
Michel Delpont
Re : Ascobolus species
Hello.

Your mushroom looks like A.furfuraceus which can be quite variable in terms of ornamentation and spore size. A.perplexans, quite close, is nevertheless differentiated by spore ornamentation and a slightly different exipulum. The reaction of the asci to Melzer would also be different but I have rarely found this species. A.Michaudii has smaller spores and less dense spore ornamentation.


Michel.

B Shelbourne, 14-09-2024 12:34
B Shelbourne
Re : Ascobolus species
Thank you, these three are the species that I considered.

The spores are on the small side of the R. furfuraceus range, but the asci are too broad for A. michaudii and A. perplexans according to the Yi-Jian Yao key.

The ornamentation seems to be between the denser A. perplexans and the sparser A. michaudii. I also checked the iodine reaction now and the asci are quite strongly amyloid, which seems to rule out A. perplexans also. As you say, A. michaudi also seems to have smaller spores, and it is described as stipitate to substipitate.
  • message #80163