Cyathicula coronata on Urtica dioica - 303628165

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Cyathicula coronata on Urtica dioica - 303628165

Danny Newman, 12-01-2026 05:24

Cyathicula coronata on Urtica dioica
Cataloochee Divide Trail, Great Smoky Mountains National Park, Haywood County, North Carolina, USA
https://www.inaturalist.org/observations/303628165

photo credits: Connor Dooley & Fenner Martin Morse
micrographs: Patrick Verdier

sequence available at iNaturalist link

Spores:

(19.8) 20.3 - 22.2 (22.5) × (3.5) 3.8 - 4.9 (5) µm
Q = (4) 4.4 - 5.7 (6) ; N = 20
Me = 21.3 × 4.2 µm ; Qe = 5.1

Zotto has remarked on iNaturalist that this taxon has been repeatedly misidentified as Hymenoscyphys scutula in GenBank, if not other genetic databases.

Hans-Otto Baral, 12-01-2026 08:35

Re : Cyathicula coronata on Urtica dioica - 303628165

I add my ITS-analysis showing the problem. The lack of marginal teeth is remarkable and could point to a different species, but the available sequences, which are predominantly from outside Europe, all appear to lack morphological data. Possibly behind these deviations exist several species.

I forgot that I have a folder "coronata aff. no teeth", with 5 European collections without teeth, but with the microscopy (mostly in living state) very similar to collections with prominent teeth.

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