15-09-2025 14:40
Nicolas VAN VOOREN
Hello.I'm searching for a digital copy of the seco
14-09-2025 22:16
Philippe PELLICIERApothécies petites jusquà 3 mm, oranges, avec de
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
10-09-2025 17:18
Blasco Rafael
Hola, encontre este estiercol de vaca estos apotec
13-09-2025 14:10
Wim de GrootWe found this hymenoscyphus on rubus fruticulosis.
11-09-2025 16:57
Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
10-09-2025 23:53
Marcel Heyligen
Found on Robinia pseudoacasia together with Diapor
02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903
Holland, 07-09-2019. In riverclay area on soil (old piece of riverbank). Apothecium yellowish/greenish, darkening into brown when older, largest 2,5-3 mm. Asci clavate, 155-190 x 18-20, no Meltzer reaction (J-).Spores mature deep purple, young hyaline. I think I saw very fine granulation in the young spores, as well as fine warts. Mature spores with fissures/reticulated, 19-21 x 10-13.
Paraphyses slender, longer than the asci, yellow(ish). Septated, sometimes forked, with a slightly swollen top (not all of them).
Following van Brummelen I came to Ascobolus geophilus, but maybe I'm very wrong :)
What is your opinion? Thanks in advance!
Interesting! It is sometimes difficult to separate certain species of this genus. Compares with A.behnitziensis near geophilus. According to Dissing, geophilus spores are later adorned ornamented, unlike behnitziensis. Also try to make other preparations in the Melzer showing the asci; you say negative Melzer whereas normally the reaction must be positive.
Michel.
van Brummelen states that only very young asci are amyloid in A. behnitziensis - i.e., the blueing might be visible only in lower part of the hymenium, see here: https://www.nahuby.sk/obrazok_detail.php?obrazok_id=606132
Cheers,
Viktorie
Michel, what I read in van Brummelen about geophilus:
Asci cylindric-clavate, tapering
downwards, rounded above, 160-200 X 17- 20 p. (according to Seaver rgr6, I.e.:
"200-250 X 15- 18 p,"), 8-spored; the wall not, or scarcely, blue in Melzer's reagent.
So I am now a bit confused?