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22-02-2013 06:47

Alan Rockefeller Alan Rockefeller

I found this on well decayed oak wood at Sierra de

24-02-2013 17:38

Nina Filippova

I was going through the key by Raitviir (1970) to

24-02-2013 11:53

Caroline Hobart

Hi all, First post so hope all loads Ok apologies

15-02-2013 19:50

Esquivel-Rios Eduardo

Hi all.I found this Xylariaceae in dead wood,the

23-02-2013 14:41

Nina Filippova

According to Yao, Spooner (1999, Roesleriaceae, a

23-02-2013 00:20

Joanne Taylor

Dear friends,I have recently found a cupulate coel

22-02-2013 12:01

Michel Hairaud Michel Hairaud

Bonjour à tous, Hi to everyone, Je viens d'étud

22-02-2013 12:03

Edit Szilvásy Edit Szilvásy

Cher Forum! Le 16/02/2013 J'ai trouvé ce petit c

22-02-2013 13:40

Nina Filippova

I used Zotto's key for Ombrophila. Spores in mine

21-02-2013 01:13

Esquivel-Rios Eduardo

Hi All.I found this Hypoxylon in a dead wood. The

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Unusual Asco from Mexico
Alan Rockefeller, 22-02-2013 06:47
Alan RockefellerI found this on well decayed oak wood at Sierra de Cacoma, Jalisco, Mexico.

Spores smooth, inequilateral, 10.5 – 13 × 5 – 6.5 µm, with 1 or 2 oil droplets per spore. 8 spores per ascus. Asci walls invisible in KOH.

Spore measurements:


10.6 [11.4 ; 12] 12.8 × 4.8 [5.5 ; 6] 6.6 µm
Q = 1.7 [2 ; 2.2] 2.4 ; N = 15 ; C = 95%
Me = 11.7 × 5.7 µm ; Qe = 2.1

Any help with identification would be appreciated! 

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Stip Helleman, 22-02-2013 07:09
Stip Helleman
Re : Unusual Asco from Mexico
WOW!
Really beautyfull, never seen something like this before. Some Xylariaceae I would say with this germ-split. There are people who know them.

cheers,
Stip
Thomas Læssøe, 22-02-2013 12:47
Re : Unusual Asco from Mexico
extraordinarly handsome fungus - at least from xylariologist point of view. I have seen similar stuff in Venezuela (left in situ - no permit) and immature rather similar stuff from Ecuador. I think somebody posted a similar fungus here i ascofrance sometime back. Maybe Jacques remembers. Most likely it is undescribed and fits in a very braodly conceived Xylaria but probably rather distantly related to the type species. Was the wood full of insect (beetle?) frass (excrements)?. The Ecuadorean material emerged from a very thick layer of beetle frass.

cheers

Thomas
Jacques Fournier, 22-02-2013 15:39
Jacques Fournier
Re : Unusual Asco from Mexico
very nice indeed! It is unknown to me too but I guess it might affinities with Podosordaria truncata that occurs on charred wood in neotropics and has larger ascospores and lacks the yellow tinge just under the surface.
It should be cultured because the anamorph is required to assess whether it is a Podosordaria or most likely a Poronia. Sequencing would be rewarding too.
Alan, I suggest you send your fungus (gently dried!) to Yu-Ming Ju in Taiwan, sure he will be highly interested.
Cheers,
Jacques
FELIPE SAN MARTÍN, 22-02-2013 22:21
FELIPE SAN MARTÃN
Re : Unusual Asco from Mexico
Podosordaria entosulphurea Rogers (or San Martín), San Martín & Ju.
FELIPE SAN MARTÍN, 22-02-2013 22:31
FELIPE SAN MARTÃN
Re : Unusual Asco from Mexico
I found this species twice growing on wood in Mexico: in an unespecified locality in Morelos state, and growing from roots of Eugenia capuli  in a cloud forest of Tamaulipas state.
Danny Newman, 23-02-2013 00:48
Danny Newman
Re : Unusual Asco from Mexico
also here:

http://mushroomobserver.org/116012?

P. entosulphurea and P. elephanti were considered given their yellow pigmentation, but too many characters do not match the species seen here.
Jacques Fournier, 23-02-2013 08:26
Jacques Fournier
Re : Unusual Asco from Mexico
Hi Felipe,
thanks for your identification, it's always good to have the opinion of the inventor of the species. We all learnt something here.
Cheers,
Jacques
Guy Marson, 23-02-2013 10:35
Re : Unusual Asco from Mexico
Hi Alan,

Would you please test the yellow pigment of pic #5 with UV-light(@365nm). It might be fluorescent (->orange).
Thanks a lot.
Cheers,
Guy     


FELIPE SAN MARTÍN, 23-02-2013 19:01
FELIPE SAN MARTÃN
Re : Unusual Asco from Mexico
No doubt Jacques, this site is exceptional for those curious about ascos and eager to learn from especialists, as you are.
FELIPE SAN MARTÍN, 23-02-2013 20:27
FELIPE SAN MARTÃN
Re : Unusual Asco from Mexico
Dear Denny: Would you like to point out the characters do not match among P. entosulphurea and the taxon collected by Alan Rockefeller in Jalisco? Stromata measurements (separating fertile head and stipes) and stipes features  will be very helpful (on dry!!!).
Danny Newman, 24-02-2013 02:32
Danny Newman
Re : Unusual Asco from Mexico
Felipe,

In your description of P. entosulphurea as Xylaria entosulphurea in Rogers et al. 1996, you indicate that the stipes are "ribbed" and 1mm in diameter.  Those of Alan's observation appear to be smooth and thicker than 1mm.

If you described the sp. from dry material, perhaps the striations are a feature that only appear in age?

With regard to the stipe width, 1cm would seem more appropriate, even just judging by the photos in the Mycotaxon paper (Rogers et al. 1998, pg. 484 fig. 1), as well as for Alan's specimen.  Could this be a typo?

Also, in the NOTES section of the description of P. elephantii in Rogers et al. 1998, X./P. entosulphurea is said to be differentiated from P. elephantii by having smaller spores and occurring on dung.  This conflicts with the lignicolous habit described in Rogers et al. 1996.


References:

Rogers, J.D.; San Martin, F.; Ju, Y.-m. "Mexican fungi: _Xylaria entosulphurea_ sp.nov. and neotypification of _Entonaema globosum_." Mycotaxon 58 (1996), 483-487. [http://www.cybertruffle.org.uk/cyberliber/59575/0058/0483.htm]

Rogers, J.D.; Ju, Y.-m.; San Martín, F. "_Podosordaria_: a redefinition based on cultural studies of the type species, _P. mexicana_, and two new species." Mycotaxon 67 (1998), 61-72. [http://www.cybertruffle.org.uk/cyberliber/59575/0067/0061.htm]?

FELIPE SAN MARTÍN, 24-02-2013 19:59
FELIPE SAN MARTÃN
Re : Unusual Asco from Mexico
Dear Danny: Indeed, we described type material of P. entosulphurea on dry condition with stipes wrinkled, but in fresh they are smooth. So, I do not think such a characterr has anough taxonomic weight as to erect a new species or variety of P. entosulphurea. I think you are right, that feature appears in age (or when dry).
One cm or more of the stipes width makes type material of P. entosulphurea a wimpy collection compared with material from Jalisco. I do not know the significance of that solo character because the very distinctive yellow granules just beneath ectostroma, habitat, and ascospore features are strictly the same in both the fungus collected in Jalisco and type material of P. entosulphurea.
I do not understand what you meant when you ask: Could this be a typo?
Finally, we separate P. elephantii from P. entosulphurea because the type of substrate (elephant dung), smaller ascospores and distribution. P. entosulphurea has been collected (in Mexico so far) in cloud forests or plant communities with elements of cloud forests, and growing on plant remains (never on dung).
Best regards! 

 


Also, in the NOTES section of the description of P. elephantii in Rogers et al. 1998, X./P. entosulphurea is said to be differentiated from P. elephantii by having smaller spores and occurring on dung.  This conflicts with the lignicolous habit described in Rogers et al. 1996.

Danny Newman, 24-02-2013 22:04
Danny Newman
Re : Unusual Asco from Mexico
Felipe,

Thanks for the clarification.  I asked if 1mm was a typo because both the images of P. entosulphurea in the Mycotaxon article and Alan's images appear to show a stipe which is considerably larger than 1mm.  One thought I had was that the figure should have been 1cm, and 1mm was simply a printing error.

I did notice the list of woody substrates given in the description of P. entosulphurea in Rogers et al. 1996.  The possible contradiction exists in Rogers et al. 1998, though it could just be unclearly worded:

NOTES: This fungus resembles X. entosulphurea J. D. Rogers, F. San Martin, & Y.-M Ju (Rogers et al., 1996) in gross morphology, in the yellow subsurface granules, and i producing both conidium-bearing structures and aconidial (probably teleomorphic) structures in culture.  That fungus is transferred to Podosordaria elsewhere herein.  It differs in occuring on dung, in its smaller ascospores, and in its distribution as presently understood.?

The way it's written, it sounds like X. entosulphurea differs from X. elephantii by occurring on dung.  Upon further reading and receiving your comment, I see that the opposite is true.
Alan Rockefeller, 25-02-2013 08:09
Alan Rockefeller
Re : Unusual Asco from Mexico
Thanks for the help!  

I'll check the dried collection under a black light when I go to Mexico this summer.