Little Brown Mushroom 1 (Pluteus sp. ?)

Hi. I have found a nice cluster of caramel-cinnamon brown mushrooms with a paler border measuring 1-3 cm wide (pileus diameter) and about 5cm long. The stipe is cream, smooth except for some pruinosity at the apex and not attached to the gills. Spore print medium brown. Spores elliptic with obtuse ends, not ornamented measuring 8.2 × 5.1 µm [ 6.8) 7.4 - 9.1 (10.4) × (4.4) 4.7 - 5.6 (5.9) µm // Q = (1.3) 1.5 - 1.8 (2) ; N=27 // Me = 8.2 × 5.1 µm ; Qe = 1.6 ; Ve = 113 µm3]. Pileipellis a hymeniderm of angular cells. Margin of gills completely lined with dense tufts of short (19-24um long) cheilocystidia, clavate-utriform, hyaline. I think we are dealing with a small Pluteus. But which one thomsonii ?

There are sporeprints of pluteus in the brown hues, and maybe my image got a bit darker after the White balance adjustment. Saying that, I do not commit myself it is a Pluteus 100% . The gills are free (or just a bit adnexed)

Zitat von Beorn

Hello / Good afternoon!

Maybe this belongs to Psathyrella? Or at least Psathyrellaceae?

LG; Pablo.

OK, I try to check and key under this genus s.l. Many thanks

OK HAROLD, seems there is a consensus about no Pluteus which I accept. Psathyrellaceae was suggested.... I check along that genus

Zitat von zuehli

I'm sure that's no Pluteus.

best regards

Harold

Hello everyone and thank you for your valuable tips. I think I agree that we are in the Psathyrella or something around Mythicomycetaceae genera (Psathyrella and Mythicomycetaceae are sister families). My problem with the latter family is that some characters obtained from the paper describing the family (Vizzini et al., 2019 - doi.org/10.3114/fuse.2019.03.05) do not match with my specimens, namely Mythicomycetaceae should have:

- Pileipellis a thin ixocutis with parietal pigment

- Cheilocystidia thick-walled, inocybe-like, often with hyaline crystals at apex

I see a hymeniderm pp. and the cc. without crystals. If my reasoning is correct, I focused on Psathyrella and apply Melzer Key

There aren't much species of Psathyrealla without a germpore and the key took me to section A (no seta in cap, veil absent, no yellow pigment in cc, plerocystidia absent) or section D (no seta, veil absent, no yellow pigment in cc, pleurocystidia present). I did not see pleaurocystidia but I took both sections of the key into consideration.

In Section A, the closest would be Coprinopsis submicrospora which i dont see it much similar

In Section D, the closest would be Psathyrella clivensii but there are other options but things get more tough down the key

Pathyrella clivensis

Psathyrella clivensis Fungus Species

Psathyrella clivensis – Belobetna črnivka – Gobe na Bovškem

www.gobenabovskem.si

Psathyrella clivensis - A.M.B. PESARO

Genere Psathyrella Specie clivensis (Berk. & Broome) P.D. Orton Sinonimi: Foto   Exsic. n. 2815 Erbario Maletti. Determinatore: Maletti M. Foto. Maletti M.…

www.ambpesaro.it

Spores match incl. size, shape, no germ pore, thick-walled

White Stipe

Short cheilocystidia

No or scanty Veil

Habitat is not so different, also in alkaline soil

Overall colours and small size of cap quite similar

I am glad to have some support re my reasoning of this puzzle. Thank you so much !!!