24-07-2024 13:19
Thomas FlammerI am looking for a PDF of the above article. Thank
21-07-2024 10:13
Thierry Blondelle
Bonjour,Récolte sur branchette de Castanea dans u
21-07-2024 10:28
Alan Rockefeller
Which Peziza did I find on horse dung in Humboldt
19-07-2024 11:08
Miguel Ángel Ribes
Good morningThis Scutellinia from July 9 grew at 1
21-07-2024 06:23
Masanori KutsunaDear all, Does anyone have these papers and send
08-07-2024 23:34
Villalonga PacoSmall Scutellinia growing in garden soil (calcareo
Hello,I made a loan of a collection of Microstoma from South Korea.
For the beginning, I have used the key to the genus by Tie-Zhi et al. 2018 - it´s in Chinese, so I translated it to English using Google Translator - of course this can have some limits, nevertheless, I led me to M. floccosum.
However, in 2021, another species which could be a good candidate was described from Japan - M. longipilum.
According to Tochigara et al. 2021, the main differences should be the colour of apothecia (scarlet or dull red in M. floccosum, salmon pink to pale orange in M. longipilum) and lenght of hairs (but this is a bit unclear to me: "over 1000 micrometers" in M. floccosum, while "up to 3000 micrometers, usually over 1500 micro" in M. longipilum). Some sources give only "up to 1000 micrometers" for hairs in M. floccosum.
I am attaching photos of dry apothecia - in them, I would say the colour fits better for M. longipilum. Also the aggregared growth would be OK for M. longipilum. Note the brown hyphae at the base of apothecia. A photo of fresh apothecia, taken by the collector, can be found in this presentation, in time 28:40: https://www.youtube.com/watch?v=WmtAD5YM4LA
Hairs are often over 1500 micrometers, the longest hair I measured was 1875 micrometers long.
Ascospores in the South Korean collection were (20.2)21.7-26.5(28) × (10.8)11.6-12.5(13.1) µm, Q = 1.8-2.4, n = 55. Me = 23.9 × 12 µm; Qe = 2 (but this cannot help too much, because size of ascospores is overlapping in the two species). The have no apiculi.
What´s your opinion? There are many photos of M. floccosum in the internet, some also having pinkish colour, but I think it cannot be excluded some are wrongly identified.
Zuzana
About the colour, of course, the density of carotenoid pigments can vary and change the global aspect, including with exsicata.
Maybe the biogeography could also help. M. floccosum was first discovered in North America, so Asian collections should be revised. The phylogeny published in the paper introducing M. longipilum shows clearly that Japanese and Chinese collections named M. floccosum belong to a sister clade of North American collections.
It seems it will not be possible to make a clear conclusion without sequencing.
I should have made this loan three years ago, and wouldn't have problems with identification like now ????
