18-07-2025 23:03
Josep Torres
Hello.Fruitings between 51 and 130 microns in tota
16-07-2025 17:34
Bernard Declercq
Hello,I have trouble distinguishing above mention
14-07-2025 11:20
Michel Hairaud
Bonjour, Voici une espèce de (?) Hyaloscyphace
16-01-2023 21:31
Riet van Oosten
Hello, Nearby the find of Calycina claroflava on
14-07-2025 17:55
Yanick BOULANGERBonjourAutre dossier laissé en suspendJe viens de
14-07-2025 11:17
Yanick BOULANGERBonjourJ'ai un dossier Jackrogersella qui est rest
14-07-2025 15:52
Gernot FriebesHi,I wanted to share this collection on Rubus idae
14-07-2025 13:37
Gernot FriebesHi,do you think this collection could be R. ulmari
I was wondering if anybody could confirm what I think this is? The substrate is a 1 year old Corsican pine needle (Pinus nigra subsp. laricio), entirely necrotic and abscised. The fruit body was sub epidermal, erumpent, black and a few millimetres in diameter. The asci are not clearly visible but the ascospores are. The ascospores are 2 - 3.5 um wide and about 13 -19um long. I think this is Mycospharella. Does anyone think so as well or can maybe identify to species?
Many thanks in advance,
Martin
The first question is important of course.
For the identification, if it's really a Mycosphaerella ( I think it is), you can use the website : http://www.cbs.knaw.nl/mycosphaerella/defaultinfo.aspx?Page=Home
You should be successful with it.
Alain
I am glad you think it is Mycosphaerella. I wanted to be sure before continuing.
Given the locality and that there was significant Dothistroma infection on other needles and also the size of the ascospores I am now much more confident that it is Mycosphaerella pini! Interesting as this is the first time the teleomorph has been observed in the UK!
Thank you for your help!
Martin
It is probably not M. pini.
In CBS- website (Stalpers'one, I have given the link), ascospores size is 10-12 x 3-3.5 µm (so a ratio L/l very different). Perhaps it's another species. In Europe, more than 5 are recorded on Pinus: pini, pinicola, pinifolia, conygena, dearnesii, and perhaps other ones. But is it really a Mycosphaerella ? Could you describe hamathecium and could you show asci ?
Alain
Hmm, now I am thoroughly confused J You are right Alain, there seem to be nine Mycosphaerella species on Pinaceae, of which at least five have been found in Europe. But is seems there is at least some partial synonmy. Are not M. acicola and M. dearnessii the same? And according to Evans (1984) there seems to be some confusion between M. pinicola and M. gibsonii. There also seem to be two entries for M. pini on Mycobank. One entry gives the ascospore dimensions as 10-12 x 3-3.5 (http://www.cbs.knaw.nl/mycosphaerella/BioloMICS.aspx?Table=Mycosphaerella%20sensu%20lato%20teleomorphs&Rec=1489&Fields=All) the other as 11-17 x 3-4.5 (http://www.cbs.knaw.nl/mycosphaerella/BioloMICS.aspx?Table=Mycosphaerella%20sensu%20lato%20teleomorphs&Rec=1490&Fields=All) .
I will try to have another look at the sample but it doesn't look promising L . Sorry for the lack of data, but does it look like it could be something other than Mycosphaerella (unfortunately only from info so far given)? The asci seem to disintegrate or are not very visible at all. :(
Would anybody happen to have the original description of M. pini? Munk, A., 1957, Dansk botanisk Arkiv 17(1): 312 Maybe it will offer some insights?
Thank you again for your help and comments!!
Kind regards,
Martin