28-04-2024 18:05
Bernard CLESSEBonsoir à toutes et tous,J'ai trouvé ce matin ce
24-03-2024 08:27
Thierry BlondelleHiOn Hedera helix fallen branchEcological habitat:
26-04-2024 10:07
Mathias HassHello, Does anyone know what this is? Found on J
24-04-2024 21:54
éric ROMEROBonjour, J'ai trouvé ce Lasiobolus sur laissées
23-04-2024 15:18
Lothar Krieglsteiner... but likely a basidiomycete. I hope it is o.k.
23-04-2024 13:17
Edouard EvangelistiBonjour à tous, Je viens de récolter ce que je
23-04-2024 21:49
Ethan CrensonHello all, A friend recently found this orange as
22-04-2024 11:52
Zuzana Sochorová (Egertová)Hello,I made a loan of a collection of Microstoma
11-01-2022 16:36
Jason KarakehianHi does anyone have a digital copy of Raitviir A (
Now I make "a little revision" of old specimens. So, there are Pezicula cf. acericola and P. cf aesculea, identified by previous researcher.
According to Verkeley, 1999 ("A Monograph of the genus Pezicula..."): P. aesculea has a bit "thinner" spores with L/W 3,6-4,4, while P. acericola has "thicker" spores with L/W 3,2-3,5.
In my specimen: Pezicula cf. acericola has L/W 3,1-5,3, mostly 3,8-3,9. Pezicula cf. aesculea L/W 3,3-4,2, mostly near 4.
Other differences: Pezicula cf. acericola has slightly larger apothecia, 1-2 mm, in small clusters consisting of 4-6 fruitbodies, Pezicula cf. aesculea has smaller fruitbodies, 0,5-1,2 mm, up to 13 in cluster.
First I thought, that I just have one species. But here, in Ascofrance database, I see 2 interesting records:
http://www.ascofrance.com/search_recolte/1646# - Pezicula aesculea, with quite "thick" spores and
http://www.ascofrance.com/search_recolte/2290 - Pezicula acericola, with quite "thin" spores and L/W 2,5-5.2!!
So, I' m confused. Where is the misunderstanding? Is L/W parameter important for distinguishing of these species? What are other important parameters?
Hope for your help very much,
Irina
Confusion is the base of science :-)
it seems that the both names have been mixed up unfortunately in both collections.
Note that in 1646 the last 2 photos are macroconidia, recognized by the flattened end.
The L/W ratio is the distinguishing feature, supplementary to that the spores are sometimes curved at the base in aescula.
the size and margin feature are from minor importance because this can be dependent of external influences.
As for the number of apothecia that are arising from one stroma (in acericola up to 13) this does not exclude 4-6
Your both collections seems to fit to aescula.
I hope this was of any help
Stip
Thank you for explanation, Stip!
To be more presice, in "acericola" clusters consisted of mainly 3-4-5 up to 6 fruitbodies, in "aesculea" clusters were 7-8-9 up to 13 fruitbodies.
But now with your comments I come back to idea that I have one species - aesculea. Furthermore, I have spores with curved ends in both cases.
Cheers,
Irina