Accès membres

Mot de passe perdu? S'inscrire

28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

« < 1 2 3 4 5 > »
Hypoxylon rubiginosum??
Dartanha Soares, 24-04-2015 22:07
Dartanha SoaresDear all,

This week I found this fungus, which I believe be Hypoxylon rubiginosum "species complex", but I would like to hear some additional (expert) opinions.
In my opinion the fungus presented here is the same posted by Enrique Rubio (http://www.ascofrance.fr/search_forum/15884),
The fungus was found on dead twigs of Tabebuia sp., in Southeast Brazil.


Short Description:
Stroma dark brick-red to brown, 3 to 8 mm, sometime reaching 1 cm, with minute whitish dots (ostioles) below or at same level of the stromatal surface (Fig.1A-D); Ectal-excipulum textura prismatica (Fig.1H); Asci cylindrical up to 130 x 6-8 microns (Fig.1I-K); Ascopores periospores (Fig.1L-O) elliptical with on side flattened, 8.5-10 x 4-5 microns, with germ slit from end to end (Fig.1Q-S) and with almost inconspicous ring-like transverse ornamentation (Fig.1T).


Additional notes: This specimen reacted positively with MLZ (blue apical ring), without pre-treatment with KOH (Fig.1P). Orange pigments on paper with KOH 5% (Figs. 1E-F).


Any advise will be welcome.
Thank you very much.


Legend: A and B - superficial view of the stroma; C - transversal section of a stroma; D - laminar section of a stroma; E, F and G - pigments on KOH after 10 sec, 5 min, and 1:30 h, respectively; H - ectal-excipulum textura prismatica; I and J - asci on MLZ; K - young ascus on H2O; L, M, N and O - sheat release; P - blue apical ring in MLZ without pre-treatment with KOH; Q, R and S - germ slit; T - ring-like transverse ornamentation.

. Bars=10 microns, except A-G.
  • message #35404
Jacques Fournier, 25-04-2015 14:36
Jacques Fournier
Re : Hypoxylon rubiginosum??
Hi Dartanha,
Hypoxylon rubiginosum does not occur in tropics but it has many look-alikes. Based on the somewhat vinaceous tone of the stromata and the sigmoid germ slits I would go for H. fendleri Berk. ex Cooke but with some reservations.
Could you send it over at the following adress?

Jacques Fournier
Las Muros
F. 09420 Rimont

Thanks,
Jacques
Dartanha Soares, 27-04-2015 17:19
Dartanha Soares
Re : Hypoxylon rubiginosum??
Hi Jacques,

Thank you very much for your comment.
I sent a private email to you.

Dartanha