Accès membres

Mot de passe perdu? S'inscrire

16-11-2018 19:57

Viktorie Halasu Viktorie Halasu

Hello forum,I'm looking for some protocol how to s

16-11-2018 20:32

Marc Detollenaere Marc Detollenaere

Hello forum,   Could someone help me with the f

16-11-2018 14:00

Castillo Joseba Castillo Joseba

De ayer en bosque de encinasPienso en  Otidea umb

11-11-2018 09:24

Castillo Joseba Castillo Joseba

En bosque de encinasPienso en Otidea alutaceaA ver

14-11-2018 19:07

Andgelo Mombert

Bonsoir,Sur bois mort de feuillu. Apothécies sess

12-11-2018 15:38

PASCAL DUBOC

Bonjour sur tige herbacée en milieu marécageux,

11-11-2018 13:43

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et tous,Que pensez-vous de cet A

12-11-2018 15:56

Castillo Joseba Castillo Joseba

De esta mañana en suelo arenoso junto a pinar y c

11-11-2018 15:12

Castillo Joseba Castillo Joseba

Me mandan  esta muestra seca desde Galicia,   en

11-11-2018 19:33

Thorben Hülsewig

Hi there, today i found on stems of Eupatorium sp

« < 1 2 3 4 5 > »
Ramsbottomia (Lamprospora) crechqueraultii?
Ethan Crenson, 09-07-2018 04:27
Found today in New York City (Staten Island) in wet, muddy area near a stream. Tiny orange discoid ascos about .8 - 1.4mm in diameter, soft and granular in appearance.

Asci are about 232-297 by 17-24µm and IKI-.


Spores in asci appear in 3 forms. 1. Smaller, thick walled, hyaline, globose and multi-guttulate. 2. More or less the same as above but wrapped in a gelatinous sheathe, and 3. larger globose, hyaline ascospores with spines. I assumed that the spores ornamented with spines were the mature ascospores and measured those: 20-21 by 20-21µm. The spines are as long as 2.5 µm.


Excipulum appears to be textura angularis. Paraphyses have orange contents and are slightly swollen at the tips to a width of about 7.5µm.


Is this Ramsbottomia crechqueraultii? I have noticed that many online resources (Indexfungorum etc.) retain this species in Lamprospora. Any opinions are welcome!


Thanks in advance.


Ethan

  • message #54041
  • message #54041
  • message #54041
  • message #54041
  • message #54041
  • message #54041
  • message #54041
Viktorie Halasu, 09-07-2018 07:52
Viktorie Halasu
Re : Ramsbottomia (Lamprospora) crechqueraultii?
Hello,

Benkert & Schumacher (1985, Agarica 6(12): 28-46) stated in their emendation that the genus Ramsbottomia differs from Lamprospora in not being bryoparasitic, having ectal excipulum of t. globulosa or globuulosa-angularis, and having smooth margin (not crenulate / frayed like Lamprospora). I don't know if there are any molecular data on the Ramsbottomia-Lamprospora relationship. 

There should be short and thick thin-walled hyphoid hairs on the receptacle, either hyaline or light brown. If the latter, you might compare R. lamprosporoidea too (if you acknowledge it as good species and not a synonym of R. asperior). I haven't seen yet the spore sheath to survive to their maturity, usually it disappears sooner. Some Scutellinias have similar one - S. trechispora or legaliae. 

It's a very nice genus, I'm always glad when I find it, but I think it needs some molecular work to clarify how many species there actually are (2, 3, or 4, in different authors' concepts) and how to distinguish asperior from crechqueraultii (is the primary character ornamentation height or less globose shape?).

Viktorie
Gilbert MOYNE, 09-07-2018 08:24
Re : Ramsbottomia (Lamprospora) crechqueraultii?
Votre espèce semble parfaitement correspondre à Ramsbottomia crecqueraultii avec ces aiguillons de 2-3 µm. R. asperior possède ses spores souvent subglobuleues et l'ornementation de R. macracantha est beaucoup plus forte avec des aiguillons en forme d'épines dépassant 5 µm

Gilbert
Ethan Crenson, 09-07-2018 17:08
Re : Ramsbottomia (Lamprospora) crechqueraultii?
Viktorie and Gilbert, thank you for your comments.  Would either of you happen to have a copy of the Benkert & Schumacher (1985, Agarica 6(12): 28-46) paper that you could share with me?
Gernot Friebes, 09-07-2018 18:22
Re : Ramsbottomia (Lamprospora) crechqueraultii?