this is the Welsh language name. The UKS Index sometimes shows a few vernacular names. I suppose we would like the English one and I think this has been solved, as the previous Observation has the Welsh name
https://www.ispotnature.org/communities/uk-and-ireland/view/observation/855867/
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So you can see it is not a new occurrence and the name Mucidula mucida is obviously a synonym of Oudemansiella mucida though not all Authorities have caught up.
Interesting the NHM dictionary IS up tp date but the iSpot version is already behind (since Nov 2023).
https://www.nhm.ac.uk/our-science/data/uk-species/taxon?tvk=NHMSYS0001474869
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We are already missing Chris Valentine who would run some code and update the dictionary.
A new person in ‘in place’ - I hope it won’t be long before the Dictionary catches up.