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14-12-2017 14:19

Castillo Joseba Castillo Joseba

En Phytolaca americana, me mandan el material sec

14-12-2017 11:51

Per Marstad Per Marstad

3-8 mm in diameter, black, sp. 14-15 x 7-8 my, asc

14-12-2017 11:51

Per Marstad Per Marstad

3-8 mm in diameter, black, sp. 14-15 x 7-8 my, asc

13-12-2017 20:24

BERNARD CLESSE BERNARD CLESSE

J'ai trouvé hier, dans un xérobrometum (pelouse

14-12-2017 00:05

Valencia Lopez Francisco Javier

Hola a todos/asEstas Plicarias están recolectadas

13-12-2017 22:32

Pérez del Amo Carlos Manuel Pérez del Amo Carlos Manuel

Hola amigos, Pongo datos de una Otidea que encont

07-12-2017 22:53

Rubén Martínez Gil Rubén Martínez Gil

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

12-12-2017 06:24

Ethan Crenson

Hello all,Yesterday in Queens, New York City I fou

12-12-2017 17:03

Ethan Crenson

From New York City.  The perithecia are immersed

13-12-2017 10:41

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,J'ai trouvé hier en pel

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possibly Pulvinula constellatio ? on moss debris
Ethan Crenson, 21-08-2017 01:44
In the Green Mountains of Southern Vermont, US.  Orange apothecia 2-4mm wide on soil and moss debris. 8 spored asci, IKI-, measuring 205-220 by 15-20µm.  Hyaline, globose spores with numerous guttules 12-16 by 12-16µm.  Paraphyses filiform, many curved at the ends, some appear to be branched, about 2-2.5µm wide.  This resembles Pulvinula constellatio in Fungi of Switzerland.  Can anyone confirm?  Thanks!
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Nicolas VAN VOOREN, 22-08-2017 07:53
Nicolas VAN VOOREN
Re : possibly Pulvinula constellatio ? on moss debris
The ascospores of P. convexella (= P. constellatio) are usually larger, i.e. 16–19 µm diam.
So probably another species.
Ethan Crenson, 24-08-2017 06:39
Re : possibly Pulvinula constellatio ? on moss debris
Nicolas, thank you for your comments.  There seems to be some uncertainty about the spore size for P. convexella/P. constellatio:
Pfister (Synopsis of the Genus): 18-20 (as P. convexella)
FoS: 13-17 (as P. constellatio)
Dennis: 13-15 (as P. constellatio)
Beug: 13-18 (as P. convexella)
Seaver: 15-20 (as Lamprospora constellatio)

In Pfister's Synopsis, P. convexella and P. cinabarrina match in apothecia color, spore features (other than size) etc.  P. miltina is not described in full, referring to Rifai (1968) (which I do not have).  But I have seen reference to P. miltina elsewhere (Bioimages UK) which seem to align with my collection well:
Apothecia: 3-7mm diam.
Ascospores: spherical, hyaline, smooth,14-16µm diam., with central mass of small oil drops.
Asci: 8-spored, apex not blued in Melzer's Iodine, upto 250µm long, but mostly smaller.
Paraphyses: 2µm diam, slightly wider at the tips, curved at the tips, mostly unbranched, with granular orange contents which turn green in Melzer's Iodine"

Would you say Pulvinula miltina in my case?

Thank you again,


Ethan

Nicolas VAN VOOREN, 26-08-2017 16:09
Nicolas VAN VOOREN
Re : possibly Pulvinula constellatio ? on moss debris
I don't think so. P. miltina is an Australian species and maybe an endemic species.

Lothar Krieglsteiner, 26-08-2017 18:24
Lothar Krieglsteiner
Re : possibly Pulvinula constellatio ? on moss debris

Is there any modern key on Pulvinula, at least for Europe?


Best regards from Lothar

Elsa Sousa, 18-09-2017 01:13
Re : possibly Pulvinula constellatio ? on moss debris
Hi Ethan,

I found yesterday what I believe to be the same fungus, here in Portugal. I found it on a stream margin over soil attached to debris and the mesurements are exactly like yours!
I found this document, and I think this could be P. miltina too. Since it has been found on different places over the world, it is possible that it is just rarely collected. 
The document - http://www.ascofrance.com/uploads/forum_file/Pulvinula-johannis-Sydowia-60-0247-0252-0001.pdf

Regards,
Elsa
Nicolas VAN VOOREN, 18-09-2017 18:30
Nicolas VAN VOOREN
Re : possibly Pulvinula constellatio ? on moss debris
All these collections (of P. miltina) were reported before the use of molecular analyses, so I'm quiet sure that a modern review should provide another diagnostic.
Last weeks, I studied five different collections of Pulvinula (in fresh state) and I was unenable to provide a correct name, based on the known data on this genus  :-(
Best.
Nicolas