Orbilia - Forum ASCOFrance

18-07-2025 23:03

Help with some conidia.

Josep Torres

Hello.Fruitings between 51 and 130 microns in tota

17-07-2025 11:55

Una para ID 833

Castillo Joseba

De ayer en bosque de hayas y abetos, en tieraEjemp

16-07-2025 17:34

Sphaerulina cornicola versus Septoria cornina

Bernard Declercq

Hello,I have trouble distinguishing above mention

14-07-2025 11:20

Une hélotiale sur Sphagnum palustre

Michel Hairaud

Bonjour, Voici une espèce de (?) Hyaloscyphace

15-07-2025 13:27

literature request

Angel Pintos

Hello, does anyone have access to the following ar

16-01-2023 21:31

Troposporella fumosum => Troposporella monilipes

Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Hypoxylon cf ticinense

Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Jackrogersella minutella VS Hypoxylon cohaerens var. microsporum

Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Olla aff. millepunctata (croziers +) on Rubus idaeus

Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Rutstroemia ulmariae(?) on Saxifraga rotundifolia

Gernot Friebes

Hi,do you think this collection could be R. ulmari

Orbilia

Khomenko Igor, 17-07-2020 17:12

Hi, this is my first post and I'm looking for help with the identification of this Orbilia.
On Acer log in the area that is flooded for most of the year, except now.
Apothecia up to 1mm, bright orange.
Spores allantoid,
(4.1) 4.9 - 6.4 (6.7) × (1) 1.1 - 1.4 (1.5) µm
Q = (3) 3.8 - 5.4 (6.4) ; N = 28
Me = 5.5 × 1.2 µm ; Qe = 4.5
Each spore with globose spore body and two black spots.
Paraphyses have small bright orange droplets.
I still have a fresh specimen, so I can get more data if needed.
More pictures here:
https://inaturalist.ca/observations/53180147

Hans-Otto Baral, 17-07-2020 17:31

Re : Orbilia

Hi Igor

welcome to the forum!

You start with high quality and an extraordinary species. I first did not believe that the map shows the correct place, but then I did. So it is from Ottawa.

This is Orbilia xanthoflexa, an undescribed species that I only saw from two collections myself, both on Acer (!), because it is unknown in Europe (and also Asia) so far. This species might not be rare in the northeast of North America but I never found a pubilshed description that fits. It was repeatedly collected by Don Pfister and Rosanne Healy in Massachusetts since a long time, but appears to display some variation in spore width.

The monograph is actually finished, but when it will go online we cannot say yet.

Zotto

Khomenko Igor, 17-07-2020 18:22

Re : Orbilia

Thank you very much Hans-Otto.
No wonder that I couldn't find it myself. It is actually not in Ottawa, but on the other side of the Ottawa river in Gatineau, QC, Canada. I collected two species of Orbilia from that area. The second I believe is Orbilia dryadum, but I could be wrong. What do you think?
https://inaturalist.ca/observations/53320066

I also collected O.sarraziniana, O.luteorubella, and O.xanthostigma from Ottawa this year.
https://inaturalist.ca/observations?d1=2020-01-01&place_id=any&subview=grid&taxon_id=353030&user_id=ikhom&verifiable=any

Hans-Otto Baral, 17-07-2020 22:18

Re : Orbilia

Yes indeed, O. dryadum is perfect. Which key do you have or which version of the monograph?

I also looked at your O. luteorubella, it could be O. rosea judging from the colour. This depends on the helicoon- vs. anguillospora-like anamorph, which is rarely seen with the apothecia.

Khomenko Igor, 18-07-2020 03:35

Re : Orbilia

Hans-Otto, I don't have a key or a monograph yet for the Orbilia genus. I do get information online, from websites, few articles, forum discussions, and your shared Google Drive with lots of pictures really helps. I do create a spreadsheet with data that helps me to narrow the selection in the future, but I was avoiding Orbilia because of many reasons and paying more attention to other genera that easier to identify for amateur mycologist like me.

I haven't seen any conidia on O. luteorubelia specimens (I have two). The last specimen, the bright pink, is from a drainage canal in a forest where the water usually moving, but right now everything is dried out, so it could be O. rosea based on the habitat and the color.
The other specimen is from beaver pond and it is more orange, so I assume that it fits more O. luteorubelia.
Actually I've seen conidia on Orbilia species only ones, and I was unable to identify it. I couldn't match the size of my spores to a species. My spores were just too big. (https://inaturalist.ca/observations/39726458)

Hans-Otto Baral, 18-07-2020 07:41

Re : Orbilia

Ah of course, the various forum postings may help. And I am happy you use my folders.

Running water actually fits O. rosea.

Your last specimen could be of the O. albovinosa group but the conidia there are Y-shaped and the apothecia fringed with long glassy processes. Such conidia occur in adjacent groups, so it is not clear to me if it belongs to this or another Orbilia. Even a Fusarium I would not exclude.

Khomenko Igor, 19-07-2020 15:38

Re : Orbilia

Thank you Hans-Otto for your help.

Igor

Khomenko Igor, 30-07-2020 18:08

Re : Orbilia

Do you think this could be Orbilia pilosa?
https://inaturalist.ca/observations/39998556
Sorry, the pictures are not the best.

Hans-Otto Baral, 30-07-2020 20:41

Re : Orbilia

Hmm, did you see the paraphyses, best in living state?

Clearly no Orbilia, but the family is unclear to me. The glassy caps are odd, they resemble those of a Protounguicularia, but the hairs are very short here and the spores small.

Calycina vulgaris and Mollisia caespiticia share some of the present features.

Zotto

Khomenko Igor, 31-07-2020 16:51

Re : Orbilia

It was in early spring when the temperature was above freezing during the day and below during the nights, so it may have affected the color. Unfortunately, I didn't see typical paraphyses that I was expecting in Orbilia species. I found, what I thought was paraphyses -cylindrical, septated, forked at the base, but it was difficult to see and I wasn't ready for it.
Protounguicularia looks promising, so if I find it the next time I will know what to look for.
Thank you, Zotto.

P.S. I found another Orbilia xanthoflexa (https://inaturalist.ca/observations/54693273), this time in ON, Canada, so it must be a common species for our region.

Hans-Otto Baral, 31-07-2020 20:35

Re : Orbilia

Yes, it's again O. xanthoflexa. Could the substrate again be Acer wood? Which Acer do these leaves belong to?

Khomenko Igor, 31-07-2020 21:18

Re : Orbilia

I want to say that this is very likely from Sugar Maple (Acer saccharum), but there are other species around and it could be from any of them.

Hans-Otto Baral, 31-07-2020 21:27

Re : Orbilia

o.k., hardly believable that this is always on Acer.

Hans-Otto Baral, 01-08-2020 08:51

Re : Orbilia

What also has such glassy caps is Pezizella chapmanii, at least in my study of a collection on Picea wood. It is in my Olla folder where I now placed yours also. Apos have a stalk.

Khomenko Igor, 02-08-2020 03:33

Re : Orbilia

I re-examined the specimen and microscopy is resemble well your drawing of Pezizella chapmanii.
I added more pictures (https://inaturalist.org/observations/39998556).
My vertical section looks very close to your drawing, and the size of my spores, size, and shape of asci, and paraphyses matching yours. I was unable to see a stalk and if it is exist it is very short. I looked at the bark and it maybe came from a conifer tree. There are plenty of conifer trees around, so if we had windy days it may have been blown from the other tree.
Thank you for your help, Zotto.

Khomenko Igor, 16-09-2020 15:36

Re : Orbilia

Hi Zotto,
I was unable to id this Orbilia by myself. Would you be able to help me? Very likely on Acer saccharum. It was next to Calycina confluens.

https://inaturalist.ca/observations/59291299

Thanks,
Igor

Hans-Otto Baral, 16-09-2020 22:59

Re : Orbilia

Hi Igor

could you please send me your pics by Email? I would love to include them in my folder.

This is the rarely collected Orbilia polybrocha, a member of series Drechslerella, earlier also called Orbilia tenebricosa.

This species was recorded by Don Pfister in the US and by me in Tübingen.

Zotto

Khomenko Igor, 17-09-2020 03:27

Re : Orbilia

Thank you Zotto,
I emailed it.

Igor

Guy Marson, 27-01-2021 13:42

Re : Orbilia

Hello Igor,

Yesterday I received a parcel (sent end of December 2020) by you with 4 Canadian Orbilias.
Can I do barcoding with all the 4 species or is the material too little / valuable to sacrifice apothecia for barcoding?

Cheers,

Guy

Khomenko Igor, 27-01-2021 15:40

Re : Orbilia

Hi Guy,

I'm not familiar with the terminology and I'm not sure what you are asking me. It is all at your consideration what to do with the material that I sent you and you got everything I had from these specimens.

Best regards,
Igor

Hans-Otto Baral, 27-01-2021 16:51

Re : Orbilia

Barcoding is taking a sequence of the ITS region. As you sent the completel material, I suggest that Guy sends back what remains, either to you or to me, as a voucher for the case that someone wants to describe a new species.

Khomenko Igor, 27-01-2021 17:41

Re : Orbilia

Thank you Zotto for the explanation. I don't need the material if it is something interesting maybe you can make use of it.

Guy Marson, 27-01-2021 21:00

Re : Orbilia

Hi Igor,

Here I am sending a picture that shows your really excellent fastening method. Extremely robust, also for rough transport on all postal routes and also very well mounted for microscopic sections or the isolation of entire apothecia e.g. for DNA extraction. Simply exemplary !! Many thanks to you for this care and for sending the material!
When I have results, I'll get in touch with you.

Best regards,

Guy

Khomenko Igor, 30-01-2021 01:48

Re : Orbilia

Thank you Guy,

I also sent you another specimen 2019-496 (https://inaturalist.ca/observations/35958367) and you should get it in 2-3 weeks. This specimen is only a part of the collection, but it should have about two dozen large cups on the front side of the bark.

Best regards,
Igor

Guy Marson, 30-01-2021 14:21

Re : Orbilia

Hi Igor,

Your collection shown on iNaturalist appears to be Orbilia comma. If you can ever add a tiny bit of wood, it's easy to tell the difference between elm and ash as substrate.
I'm curious how the Canadian comma differs from the European one.

Cheers,

Guy

Hans-Otto Baral, 30-01-2021 15:24

Re : Orbilia

I have placed these pics in my Habrostictis folder (because of the conidia and spathulate paraphyses and partly long and narrow SBs) under the name caudata-like (because of the spores). Ulmus seems to me anyway probable.

Let's see what comes out :-)

Guy Marson, 31-01-2021 15:19

Re : Orbilia

I hope you will be right, with the result that O. caudata would have a different sequence (other than O. comma).

G-).

Accès membres

Forum AscoFrance