04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
04-11-2025 12:43
Edvin Johannesen
Hi! One more found on old Populus tremula log in O
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
28-10-2025 15:37
Carl FarmerI'd be grateful for any suggestions for this strik
03-11-2025 16:30
Hans-Otto Baral
Hello I want to ask you if you have found this ye
28-10-2025 19:33
Nicolas Suberbielle
Bonjour à tous,Je voudrais votre avis sur cette r
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
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
Best wishes,
Gernot