Accès membres

Mot de passe perdu? S'inscrire

08-02-2017 18:36

Lothar Krieglsteiner Lothar Krieglsteiner

.. at least it seems to be quite similar. But - fo

08-02-2017 18:56

Lothar Krieglsteiner Lothar Krieglsteiner

... collected at 21.2.2016 at the mountain Foia ne

08-02-2017 17:21

Bernard CLESSE Bernard CLESSE

Bonjour à tous,Trouvé avant-hier ce Lamprospora

08-02-2017 20:38

Enrique Rubio Enrique Rubio

Hi againI have found on fallen branches broken by

08-02-2017 08:46

Ethan Crenson

In Brooklyn, NYC on hardwood (possibly Quercus) on

07-02-2017 14:45

Roland Labbé

Bonjour !Voici un Gibellula, leiopus probable.Est-

08-02-2017 20:59

Bernard CLESSE Bernard CLESSE

Bonsoir à tous,Trouvé ce petit asco brun sur tro

08-02-2017 19:06

Angel Pintos Angel Pintos

Hello, anybody has..........Amano N, 1983. Saprobi

17-01-2017 16:43

Carmel Sammut

Found in the north of Malta on dead twig under oli

07-02-2017 22:26

Steve Clements

Bonjour,On a trouvé cette anamorphe(?) orange sur

« < 776 777 778 779 780 > »
Tiny white cups
Ethan Crenson, 07-06-2019 21:03
Hello all,
I found these tiny cups last weekend and I'd be grateful for help identifying them. They were growing on a decorticated hardwood branch in a cemetery. The largest of them reaches about 1mm in diameter. They are a translucent white with a very faint fringe at the margin. Some are slightly stipitate. Asci measure 24-27 x 3-3.5µm, IKI-. Spores are sub-fusiform, 4-4.5 x 1.5µm. Paraphyses (at least what I assume are paraphyses) have enlarged apex. Excipulum textura angularis (globulosa-angularis?)
Thank you in advance,
Ethan
  • message #58054
  • message #58054
  • message #58054
  • message #58054
  • message #58054
  • message #58054
  • message #58054
  • message #58054
  • message #58054
Martin Bemmann, 07-06-2019 21:11
Martin Bemmann
Re : Tiny white cups
Hi Ethan,

this is one for Zotto. A Hyalorbilia... perhaps fusispora?

Regards

Martin
Ethan Crenson, 07-06-2019 22:18
Re : Tiny white cups
Martin,


Thanks indeed. I did also see orange apothecia near the white ones, but I wasn't certain if they were the same taxon.

Ethan
  • message #58061
Hans-Otto Baral, 08-06-2019 16:24
Hans-Otto Baral
Re : Tiny white cups
I assume the yellow-orange are the same. And I must say, although the spores are fusoidm this is an Orbilia, because
- dead asci have a truncate apex
- excipular cells are isodiametrical
- ascus base is stalked
- paraphyses are capitate and lack exudate
- Spores are not symmetrically guttulate. The droplets are variable here and in this difficult species there is high variation in general.
I thin it is Orbilia eucalypti, though the spore width is too narrow. With a scale I could check, maybe the spores exceed 4.5 µm?
Ethan Crenson, 08-06-2019 18:16
Re : Tiny white cups
Thank you Zotto! Orbilia eucalypti... the name suggests Eucalyptus as a substrate. Does it grow on other substrates? I will make another attempt to measure and photograph the spores later today. Unfortunately, I don't have the equipment to make photographs with the scale in view.
Martin Bemmann, 08-06-2019 18:29
Martin Bemmann
Re : Tiny white cups
Hi Ethan, you don't need an eypiece with a graticule. You only need a micrometer slide once to calibrate the photos of your camera while using your different lenses from 2.5 (?) to 100 (?). Thereafter you can use software as ImageJ to apply a scale to your images.

Regards

Martin
Hans-Otto Baral, 08-06-2019 20:55
Hans-Otto Baral
Re : Tiny white cups
Various fungi have names that are historically born, also this one. It is one of the commonest Orbilias and grows on everything woody. Earlier the names O. coccinella and O. alnea were in use, the former turned out to be something  very different from the type, the latter is now a synonym of the oldest name O. eucalypti.
Ethan Crenson, 10-06-2019 21:58
Re : Tiny white cups
I used imageJ as Martin suggested.  Here are the measurements:

4.611 x 2.138
4.363 x 1.272
4.184 x 1.216
4.143 x 1.453
4.032 x 1.409
3.521 x 0.940
3.503 x 1.278
3.376 x 1.216
3.339 x 1.289
3.129 x 0.947
Hans-Otto Baral, 10-06-2019 22:07
Hans-Otto Baral
Re : Tiny white cups
a width of 1-2 µm is a bit wide range. I believe more in 1.5-2. 

More I cannot say, the group is very difficult and badly studied in thel iterature.