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07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

07-12-2019 18:45

Laurens van der Linde Laurens van der Linde

Hallo i found the P atrovinosa with a slime specie

06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

27-11-2019 16:54

Rasmus Riis-Hansen Rasmus Riis-Hansen

Hi,I hope you can help med with this disc found a

05-12-2019 09:06

Valencia Lopez Francisco Javier

Hola amigosEstoy buscando este trabajo de la Errot

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

19-11-2019 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... under a twig of deciduous tree (likely Quercus

29-06-2011 22:52

Luc Bailly Luc Bailly

Encore trois ascos de la réserve naturelle domani

04-12-2019 13:01

Mirek Gryc

Hello everyoneI inform you in advance that this is

04-12-2019 14:53

Lothar Krieglsteiner Lothar Krieglsteiner

Hello together, does somebody have: DONADINI J.-

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Hysterobrevium mori ?
Carmel Sammut, 17-01-2017 16:43
Found in the north of Malta on dead twig under olive tree.

Hysterothecia 1-3mm in length, widely spread, with longitudinal slit.
Asci 8 spored, IKI-ve
Paraphyses simple, unbranched
Spores pigmented, with 3 septa and 1 or more vertical septa
16.8 × 8.8 µm; Q = 1.9

The specimen is a Hysterobrevium and I suspect it is H. mori, but this is a new area for me. Any comments appreciated.
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Yannick Mourgues, 17-01-2017 17:46
Yannick Mourgues
Re : Hysterobrevium mori ?
Les périthèques semblent être immmergés... Pourrait-on avoir une coupe verticale de la chose ? Et un zoom sur l'ostiole ?
Dans tous les cas, ce ne sont pas les spores de H. mori.
Carmel Sammut, 17-01-2017 20:10
Re : Hysterobrevium mori ?
At higher magnifications the longitudinal 'slits' disappear.

The TS sections are the best I can make.

Any ideas?
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Alain GARDIENNET, 17-01-2017 21:37
Re : Hysterobrevium mori ?

Hi Carmel,

Definitively not an Hysteriaceae.

Perhaps you should look towards such species :

Probably not a "true" Chaetoplea, but perhaps an idea for you.



PS : Does Rhamnus alpina occurs in Olea's area ?

Carmel Sammut, 18-01-2017 17:17
Re : Hysterobrevium mori ?
Thanks Alain for you comments.

It does look similar to a Chaetoplea as indicated in the link. Unfortunately Rhamnus alpina does not occur in Malta. There are two other Rhamnus sp. (according to Stephen Mifsud's website) R. alaternus & R. oleioides. The area where I found this collection there were a number of thyme plants (Thymbra capitata) and I suspect that it may be a decorticated twig from this plant.
Within the Leptosphaeriaceae the only reported species (in Malta) belong to Leptosphaeria and a Neosetophoma but the spores are different here, so this is a new record for the islands whatever it is.

Other possibilities, I think, other than Chaetoplea are Curreya (if still valid) and Cucurbitaria but I have no literature on any of these genera.

I will open another thread to request the 1990 paper by Barr for dictyosporous genera in Pleosporalis (though it is for N. America) maybe it could be of some help.
Björn Wergen, 24-01-2017 11:50
Björn Wergen
Re : Hysterobrevium mori ?

well, this is the unknown Thyridium I am also looking for. I have already a collection sent by you in 2016, and I have a comparable specimen from Cyprus, so I think it should be mediterranean distributed.

You should send it to Julia Checa.

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Carmel Sammut, 24-01-2017 19:18
Re : Hysterobrevium mori ?
Hi Björn
          Thanks for your feedback.
          I had forgotten about the sample I sent to you. There are a number of common species between Cyprus and Malta, quite interesting.
          I will contact Julia Checa and keep you updated on any progress.
Stephen Mifsud, 25-01-2017 13:13
Stephen Mifsud
Re : Hysterobrevium mori ?
Interesting discussion... 

The habit and colour of the substrate is most probably Thymus capitatus , while I can safely exldue Rhamnus spp. In fact, I have seen something similar also on thyme in the island of Gozo, but which I have not collected. If I encounter something similar I will collect and update you.
Carmel Sammut, 25-01-2017 18:39
Re : Hysterobrevium mori ?
Thanks Stephen for your comment.

Just to conclude this topic.

I have received an email from Julia Checa and she is of the opinion (from the photos) that the specimen looks like Dyrithium lividum (Pers.) M.E. Barr.

This species has been reported by Saccardo (as Thyridium lividum) in 1914 (no.47) and 1915 (no 95) and in fact in the latter entry one collection is from Thymus capitatus. It seems to be common as indicated in the last line of 95.

Thank to all for your input.
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Björn Wergen, 27-01-2017 02:00
Björn Wergen
Re : Hysterobrevium mori ?
No, this is not Dyrithium lividum, this is another species, I definitely do not agree with Julia. Sorry.

I have recently examined a collection of Dyrithium lividum, this looks quite different. I am adding two photos of the spores of this species, and I am sorry that the recolt was in a very poor condition. You can compare with Enrique Rubio's collection right here on ascofrance:

Your species is something else, probably belonging to Thyridiaceae (similar to Mattirolia).

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Stephen Mifsud, 05-02-2017 12:03
Stephen Mifsud
Re : Hysterobrevium mori ?
I have encountered the afore-mentioned population and this time I photographed and collected them. Will study them later. I think I have two different kinds of black ascomata, one looking similar to those reported by Carmel the other more clustered and elevated (or simply they are same species but younger). All found on the surface of dead or almost dead twigs  of Thymus capitatus, often at the lower half or third om bark-exfoliated stems.

If anyone wants to examine them, I can send some samples. I'll report the micro features soon, when time allows.
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Stephen Mifsud, 08-02-2017 14:11
Stephen Mifsud
Re : Hysterobrevium mori ?
Hi, so as not to override Carmel's post I am reporting my observation of my Thyridiaceae species growing on Thyme on a seperate post. Link below:

I think they are the same species but better not assume anything at this stage.

By the way, what families are closely related to Thyridiaceae that might be considered?

Many Thanks