Beiträge von Steve_mt

Here is the section mount of another gill. The edge does not show cheilocystidia unless they got eroded or destroyed during drying / preservation. Interestingly, there are what looks as subglobular cystidia in the gill face, perhaps corresponding to pleurocystidia (?), The largest being 35x 25 um.

The microscopy is pretty disappointing. Pleuro absent, cheilo probably also, basidia not distinct and spores are quite translucent, hence I am thinking that this is not a Psathyrella. I try another attempt and I will also measure the spores.

Dried ex-siccatum found.

First hint - lamellae become translucid (colourless) when hydrated in KOH. Spore mass colour (spore print) seems to be tobacco brown - just an indication. Now trying to hunt for spores and cheilocystidia

Lot of basidioles but seldom defined basidia sterigmata. The few I saw where x 2 (-3). What do you think, do you agree from these photos ?

I have another fungus that I am trying to have a clue. I made up my mind that it is a Psathyrellaceae. Interesting is the zonation on the pileus and the its very viscid character. It was growing from a pile of old stems of dumped plants. Maybe wild plants from a nearby field. I see if I have collection for a micro assessment. Any early clues are well appreciated. Thanks!

Hairs at the base of the stipe

Stipitipellis

Cheilocystidia or basidioles ?

I know that I am asking the impossible here - but I give a try with this frequently occurring Mycena growing on detritus and litter of carob trees.

Spores seems to have various sizes ranging from 7.5 to 11.5

10.68 4.54

11.59 4.77

9.00 4.15

7.48 4.93

9.03 3.98

9.08 5.23

8.00 4.11

10.34 4.18

9.19 4.04

8.00 4.31

7.90 4.59

6.41 4.17

7.44 4.04

9.16 4.48

9.11 4.71

8.58 3.45

8.44 5.21

9.95 3.92

8.10 4.26

9.80 4.26

8.38 4.09

9.02 5.15

7.32 4.13

9.22 4.25

9.12 4.54

8.71 4.65

11.48 5.96

8.77 4.68

10.22 4.83

6.7 [8.6; 9.5] 11.4 × 3.5 [4.3; 4.7] 5.5 err

Q = 1.5 [1.9; 2.1] 2.6; N = 29; C = 95%

Me = 9.1 × 4.5 err; Qe = 2

An anamorph What is the central brown disc?

Yes you are right I interchanged the subsections by careless mistake. I will check and probably include the fourth. Thank you so much!

Thanks everyone - I think I have to give it a miss as it seems too complicated. The specimens were very small. If some wish to receive a sample let me know (PM or email)

Zitat von mollisia

Hello,

even more interesting to me would be the ascomycete on the wood (?) beneath the Pluerotus

all the best,

Andreas

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That should correspond to Boubovia nicholsonii

Where can I find more info on the taxa forming the ostreatus group please? And would Pl. ostreatus s.l. be a justified identification in this case, given further resolution with the data I have is no further possible ?

Tnx!

Thank you everyone for your help and contribution to my post

I was analysing Vellinga 1990 monograph and I am very confident that my material showed here and others from Gozo refers to P. nanus. This is what I wrote at taxonomic comment:

Taxonomic notes: Three small Pluteus species that are morphologically similar to Pluteus nanus are P. thomsonii (Subsect. Eucellulodermini); P. podospileus Sacc. & Cub and P. romellii Britz. (Sacc.) (Subsect. Mixtini). According to Vellinga & Schreurs (1985), the latter subsection is characterised by a pileipellis made up of a mixture of two types of cells: sphaeropedunculate and elongated fusiform or conical hyphae, twice the length of the former. Besides that, P. thomsonii exhibits mucronate cheilocystidia and a strong venose character on its pileus, whereas P. podospileus is macroscopically characterised by a brown floccosity or punctuations on the stipe. P. romellii has a similar pilleipellis to P. nanus, but has a distinct pale or chrome yellow colour throughout most of the stipe, sometimes also seen in the lamellae (Vellinga, 1990). Two forms of P. nanus are given in Vellinga (1990), of which distinction is based on the stipe’s colour and its fine floccose coating. The stipe's reduced floccosity and its light colour turning gray only at the base, assigned the examined material to forma nanus rather to forma griseopus (P.D. Orton) Vellinga. P. nanus and P. griseopus P.D. Orton were previously treated as separate species, but P. griseopus was judged to have minor artificial differences only in the colour of the stipe and so it was demoted to a forma by Vellinga & Schreurs (1985)

So as expected, the old dry specimen could not offer much valuable data over what I already doucmented. The spores are confirmed, the hymenium is completely eroded, the veilar remnants are artistically elegant, with brownish contents and as rather thick-walled (?), but I could just add that I have seen clamp junctions at the filiform structural hyphae; if this is of any relevance.

I attach another image of the pleurocystidia from the fresh specimen, assuming that they are Cystidia,

It is OK Andreas - thanks so much for trying to help (and you did too both in this post and previous ones too!)

Zitat von mollisia

Hello Steve,

can't judge that, I'm too less experienced in this group of ink caps. I think that is something for coprinus specialists.

all the best,

Andreas

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So what we have... The pileipellis is composed of a cellular hymeniderm made of subspherical to broadly pear-shaped cells, with a smooth surface, while the spores, copious, are subspherical, with a central oil drop, eccentrical apiculum and measuring 6-7.5um approx.

Specimens found, rather workable, I follow up. I am thinking Pluteus nanus for the small size and already found it in three locations in Gozo (kinda frequent).

I still have the specimen. Is it of further use to recheck something?

Hre it is photographed on narrow 'twigs'

banco de setas coprinopsis goudensis coprinus goudensis ulje | www.bancodesetas.es

It is a very curious Coprinopsis. Many things match for goudensis too, although admittingly the velar hyphae do look thick (but how important is this?). Then the habitat for goudensis is lignicolous and in my notes, I have written dry debris of herbaceous plants, but I have not checked very carefully the debris and maybe it was mixed with some slender twigs?!?! I can see parallel ridges along the substrate indicating herbaceous stem that dried out but I don't know which and again it is a bit (very bit!) thick and lignicolous. Ajjj!

These photos are from an old collection and I don't remember much about it, or if I have a specimen, but this photo shows clearly spores in the range of 8.5-9.5um length and pleuro- (or cheilo-) cystidia that are broad and short. I hope there weren't two or more specimens of different species close to each other and have a mixture. The substrate was annual herbaceous plants (maybe grasses?) that dried out in summer and then this fungus grew after the autumn rain.