I would like a name on this pyrenomycet, growing on Fraxinus.<br />Spores are 62-75 x 15-17.

Good evening,<br /><br />Spores:<br /><br />(57.1) 58.4 - 67 (72.9) × (14.9) 15.9 - 20.4 (21.2) µm<br />Q = (2.9) 3.2 - 3.9 (4.4) ; N = 16<br />Me = 63.6 × 17.8 µm ; Qe = 3.6<br /><br />multiseptate and guttulate.<br /><br />I would appreciate any help.<br />Thank you very much.<br />Regards,<br />Elsa<br />

<p>Hi to all:<br />These blackish, small (up to 700 microns), gregarious, solitary, globose and semiinmersed pseudothecia  were at 2-3 m high on bark of a leaving Fagus sylvatica. They seem to be ostiolate but I'm not sure.<br /><br />The spores are finally brownish or gloden brown and inconspicually 1-septate. Asci not unitunicate. Pseudoparaphyses are present.<br />Have you some idea ?<br />Many thanks again<br />Enrique    </p>

<div>Bonsoir.</div> <div>En ramassant cet asco sur marronnier, avec ces beaux ostioles compressés, je ne pensais pas qu'il serait rempli de conidiospores. Pas un seul asque.</div> <div>Une Id ?</div> <div>Yannick</div>

<div>Hi,</div> <div>I found this Pyreno on bark of alive Quercus ilex</div> Bitunicate and inamiloid asci.<br />The spores measures are 22-25 x 9-10 always with three septa.<br />At first I thought it could be navicella but there are some things don't add up.<br />Does anyone have any idea.<br /> <div>Thanks.</div> <div>Joaquin.</div>

Hi everyone,<br />I found this lichenicolous fungus on the small apothecia of a Bacidia sp.. It was hard to select photos from the ascoma, due to the size. However, this fungus as very peculiar feature: its spores are fusiforme, multiseptate (up to 9 septa), and "giant" with the following dimensions:<br />(36.1) 37.1 - 60.1 (62.1) x (8.3) 8.8 - 18.4 (21.7) µm<br />Q = (2.7) 2.8 - 4.1 (4.5) ; N = 13, Me = 51.5 x 15 µm ; Qe = 3.6 .<br />I have tryed the site Lichenicolous net, but I as not able to find anything similar. Anyone have any suggestion of what this could be?<br />Thanks,<br />zaca

Hi forum,<br />I am posting this Dothideomycete on the behalf of Paul Leroy who recently found it on wild plum stones (Prunus cerasifera) in the vicinity of Tours (France).<br />Ascomata are subglobose 0.5–0.6 mm diam, half immersed with a stout neck. The neck is broadly rounded or slightly laterally flattened, typically with a slit-like or more rarely Y-shaped ostiole. The wall is black, pseudoparenchymatous, thick and leathery, much thinner and less pigmented in the immersed part.<br />Asci are bitunicate and fissitunicate, short-stipitate, cylindrical to fusiform, with uniseriate overlaping ascospores tending to become biseriate in the mid-part. Apex with a distinct refractive annulus, well seen by contrast in Congo red. Hamathecium of narrow trabeculate pseudoparaphyses. Ascospores 35–38 x 8–9 µm, fusiform slightly inequilateral, 5-euseptate, olivaceous brown at fresh state, end cells smaller and paler, wall verrucose, without sheath.<br />We considered Trematosphaeria and Lophiostoma in which it might have been placed according to old concepts of these genera but without success. Because of the well-developed ostiolar necks and cylindrical asci with a refractive apical annulus we also considered Navicella but in this genus ascospores are distoseptate and the hamathecium is different.<br />The unusual substrate and the distinctive morphology of this fungus may remind you something we missed.<br />Thanks for your suggestions.<br />Cheers,<br />Jacques &amp; Paul<br />

Hi, here I have a second indeterminate pyreno which grew on the bark of a living Fraxinus. The ascomata are very conspicuous because they can be from Navicella-like with a small, slit-shaped neck to even Ceratostomella-like with a long and thin neck (I checked that they really are of the same species). The spores are 22,5-25 x 8-9 µm, mature always 4-celled and slightly rough, often with two paler end-cells. The asci are bitunicate and 8-spored. I didn't find a species within the Lophiostomataceae which would fit with my species. Best wishes and many thanks, Gernot

J'ai trouvé dans l'écorce d'un chêne, au voisinage d'Hysterium pulicare, des périthèces noirs globuleux pouvant mesurer jusqu'à 1 mm de diamètre, surmonté d'un ostiole que j'ai cru être au début un Mytilinidiaceae (imaginez un peu mon excitation) ; il s'agit bien de l'ostiole de mon asco. On peut penser à certains Lophiostomas. Périthèces d'abord semi-immergés puis érompants avec l'âge, laissant apparaître un subiculum brun à l'extérieur ( 2 µm de diamètre, septé). Paroi environ 60µm. Asques bituniqués . Ascospores brunes, unisériées de 60-80 x 15-17 µm avec 10-11 cloisons. Cellules extérieures très claires. La macro m'a un peu désorienté mais les spores m'ont fait penser rapidement à un Massariaceae. Ma description colle plutôt très bien avec Titanella macrospora (Speg.), pourriez-vous me le confirmer s'il-vous-plait ? Cet asco me pose davantage un problème nomenclatural. Je n'ai pas vu apparaître ce genre dans Myconet. On le donne dans les Verrucariaceae, un Eurotyomycète) dans Index fungorum (comentaire personnel : !!!?????). Personnellement, pour l'avoir eu dans les mains, je suivrais les yeux fermés Margaret Barr en le plaçant dans les Massariaceae. Pourriez-vous m'éclairer ? Alain

Hi all,<br /><br />I have found a very interesting lophiostomoid fungus growing on decorticated Fagus branch. It has small 0,3-0,6 mm broad perithecia with a typical lophiostoma-ostiolus. Spores are 24-29x4-4,5µm, first with a medium single septa, then with 3-4 septations, hyalin, mature spores very pale brown, with a distinct hyaline sheath surrounding a whole spore and acute endings. <br />Asci 70-100x6-8µm, with 8 +/- biseriate spores. <br /><br /><span style="text-decoration: underline;">Substrate:</span> Fagus (or Quercus, but I think it was <em>Fagus</em>, decorticated at all). <br /><br />What can this be? I have tried Chesters&amp;Bell and Barr, watched some photos made by Alain and so on, but there is no matching species. Macroscopically <em>Navicella pileata</em> is similar, but it has very different spores...<br /><br />I hate mycology...sometimes :D<br /><br />regards,<br />björn

Hi, here I have another indetermined pyrenomycet. The substrate is a branch most likely of Crataegus and there were only few ascomata on it. They didn't have compressed necks but because of the microscopical characters I still think it's a Lophiostoma, maybe a species next to L. quadrinucleatum/triseptatum? The quite tiny spores (11,5-15 x 5-6,5 µm) with constantly three septa are remarkable. The asci are 8-spored and bitunicate, paraphysoids are present. The ascomata are smooth and immersed. By the way, is there any good paper about Lophiostoma(taceae) besides Barr's "Notes on Lophiostomataceae"? Best wishes, Gernot ascomata:

Lichenicolous on Degelia<br />This fungus was found growing on the thallus of a Degelia (D. cyanoloma I think). It is visible as black dots immersed on the thallus of the host. Due to their small size was difficult to make a section of it and to observe it conveniently. It is completely strange for me, having some big and septated spores (no asci observed), dimensions up to 50 x 20 um. There are other structures present on the hymenium like some septate setae. I have no clue about what it can be, besides the fact that the spores look vaguely similar to those of the topic "Lichenicolous fungus on Bacidia - 2015-09-19", suggested to be of a Navicella sp.. Despite the long list of lichenicolous fungi presented in "Lichenicolous net" only few species are referred having Degelia spp. as host; one of each genera: Roselliniella, Stigmidium, Toninia, none seeming to be this one. Maybe someone know what it is. Any opinion will be appreciated.<br />Thanks in advance,<br />zaca

Bonjour, Tout est dit dans le titre. Trouvé sur l'écorce d'un vieux tronc de Salix bordant une rivière. Je suis parti pour des caractères micros et surtout pour l'aspect macro vers les Lophiotoma-Platystomum. L'ostiole est plutôt allongé et à peine compressé. Les spores sont donc muriformes avec (4) 5-6 cloisons transversales et au moins deux cloisons longitudinales dans chaque spore. J'ai des dimensions de 27-29 x 10-11 µm. La seule espèce qui semblait convenir à ma récolte, à ma connaissance, est Platystomum compressum var. nuculoides. Mes spores sont un peu larges et présentent un nombre de cloisons légèrement supérieur à celui donné par Chesters et Ann Bell. Je me demandais si les spores de Platystomum incisum étaient brunes ou hyalines ? Les auteurs ne le précisent pas et Ellis & Everhart en 1884 dans les description de leur Lophidium incisum non plus, à peine croyable. Dans le cas de leur hyalinité, ce serait un candidat sérieux. Mais peut-être que je fais fausse route, d'où mon appel sur ce forum. Alain

Bonsoir. Trouvé sur crotte de mouton, ce pyrénomycète dont je cherche le genre. Ascome entièrement noir, surmonté de soies noires. Asques bituniqués. Spores brunes, muriquées, à surface verruqueuse, 65-70 x 23-24 µm. Merci de m'orienter.