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Bryoscyphus on Preissia
Zuzana Sochorová (Egertová),
11-05-2015 20:40
Hello,I would welcome your advice on this Bryoscyphus.
It was collected in Slovakia, Mala Fatra NP, in a gorge, on old thalli of Preissia quadrata, 10 May 2015.
Apothecia grew in small groups, were slightly convex or plane, +- rounded from an upper view, pale brown, 0.5-2.5 mm in diameter, shortly stipitate.
Asci cylindrical, inoperculate, octosporic, uniseriate or biseriate, IKI+, 130-160 x 9-12 micrometers.
Spores unequilateral, smooth, with many small droplets, 12.5-15(17) x (4.5)5-5.5(6) micrometers.
Paraphyses filled with small droplets, hyaline or pale brown, septate, branched, with an obtuse apex, 3-3.5 micrometers broad, straight.
Med. excipulum consisting of cylindrical thin-walled cells (2.5-4 micrometers broad).
Ectal excipulum combination of textura angularis and text. prismatica. Hair-like projections not observed.
No combination of characters in the key in the article by Verkley et al. 1997 fits perfectly. Preissia (member of Marchantiaceae) is not mentioned as a substrate in any of the species in the key. B. dicrani and B. turbinatus have totally different hosts, so I´m considering B. atromarginatus, B. marchantiae and B. conocephali. The width of spores is between B. atromarginatus and B. marchantiae, asci are too long for B. atromarginatus, spore shape wrong for B. marchantiae. For B. conocephali, the hairs are missing.
Zuzana
René Dougoud,
13-05-2015 09:47
Re : Bryoscyphus on Preissia
Bonjour Chère Collègue,
Je pense qu'il s'agit de B. atromarginatus Verkley, van Aa & G. de Cock. Voir ma publication en dossier attaché.
Amicalement
René
Je pense qu'il s'agit de B. atromarginatus Verkley, van Aa & G. de Cock. Voir ma publication en dossier attaché.
Amicalement
René
René Dougoud,
13-05-2015 09:53
Re : Bryoscyphus on Preissia
Nouvel essai pour joindre l'annexe
René Dougoud,
13-05-2015 09:56
Re : Bryoscyphus on Preissia
Je suis désolé, la publication PDF ne passe pas. J'ai adressé la publication à la concernée via son adresse. Si vous avez de l'intérêt à cette publication, merci de le faire part en privé.
DOUGOUD, R. (2003) - Bryoscyphus atromarginatus. - Mycol. Montenegrina VI: 7-11.
René
DOUGOUD, R. (2003) - Bryoscyphus atromarginatus. - Mycol. Montenegrina VI: 7-11.
René
Lothar Krieglsteiner,
13-05-2015 10:07
Re : Bryoscyphus on Preissia
Dear Rene,
I would also like to receive the file. Thanks in advance,
Yours, Lothar Krieglsteiner
Michel Hairaud,
13-05-2015 10:44
Re : Bryoscyphus on Preissia
Bonjour Zuzana, René et tous,
Belle récolte et belles photos.
I did not recognize the spores of a last year collection I called B. atromarginatus (on Lunularia cruciata). As in René's paper (which I also used for identification) the spore shape is different , along with guttulation . Spore width of my collection (MH 120114) never exceed 4.5 µm and there always is an empty area in the spore guttuation.
Asci never exceed 120 (130) µm
I do not know B. marchantiae.
I attach pics .Amitiés Michel
Hans-Otto Baral,
13-05-2015 16:08
Re : Bryoscyphus on Preissia
Cher Michel
this is actually striking how the nucleus is in the lower part of the spore in your fungus. In all my available images I see the empty region +/- in the middle part.
Spore width seems variable, I have 3.5-4.5 up to rarely 5-5.5 µm.
Of course, I am not sure if all is the same, but i would at first sight think that yours belongs here.
Zotto
this is actually striking how the nucleus is in the lower part of the spore in your fungus. In all my available images I see the empty region +/- in the middle part.
Spore width seems variable, I have 3.5-4.5 up to rarely 5-5.5 µm.
Of course, I am not sure if all is the same, but i would at first sight think that yours belongs here.
Zotto
Zuzana Sochorová (Egertová),
13-05-2015 20:46
Re : Bryoscyphus on Preissia
Many thanks to everybody for the comments and for the article.
In my collection the spores often have an empty zone too, but rather small. I add some new photos.
Comparing my data with those in René´s article, I can see few differences - the substrate, somewhat different size of spores and asci (I measured everything fresh, in water). If I understand the French text well, René´s paraphyses were simple (mine are sometimes branched, see the photo with two lateral branches). I also never observed septa in the spores.
But these differences are probably not very important.
Best regards, Zuzana
In my collection the spores often have an empty zone too, but rather small. I add some new photos.
Comparing my data with those in René´s article, I can see few differences - the substrate, somewhat different size of spores and asci (I measured everything fresh, in water). If I understand the French text well, René´s paraphyses were simple (mine are sometimes branched, see the photo with two lateral branches). I also never observed septa in the spores.
But these differences are probably not very important.
Best regards, Zuzana
Hans-Otto Baral,
13-05-2015 20:58
Re : Bryoscyphus on Preissia
Zuzana, you don't have a scale to your spore photos? If yes i would like to measure them to get an idea especially about the width.
Septation occurs only in overmature spores in this group, so it depends on the ripeness of the apos.
Zotto
Septation occurs only in overmature spores in this group, so it depends on the ripeness of the apos.
Zotto
Zuzana Sochorová (Egertová),
13-05-2015 21:46
Re : Bryoscyphus on Preissia
I made few photos with the scale in the ocular of microscope. I cannot do it in a different way.
Hans-Otto Baral,
13-05-2015 22:08
Re : Bryoscyphus on Preissia
Thanks. Indeed I find up to 5.6 µm spore width. Also asci are a bit wider than in other collections.