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Collemopsidium elegans in Yorkshire

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  • September 25, 2026 at 4:30 pm #70618
    kianhaylescotton
    Participant

      Hi all.

      I’m just going through some old records and taking a closer look at ones I didn’t have time to investigate earlier in the year. I had this species down as Collemopsidium halodytes but looking closer it appears to have the warted and wrinkled thallus of Collemopsidium elegans instead. This would be a first record for C. elegans on the East Coast if this is the case. Sadly I didnt get a sample so can’t do any microscopy. Any guidance would be appreciated?

      Many thanks,

      Kian

      Growing on intertidal sandstone boulders at: Hayburn Wyke, VC62, North East Yorkshire, January 2026

      Link to iNat Observation: https://www.inaturalist.org/observations/360699180

      collempsorodium_sp_pic1

      collempsorodium_sp_pic2

      September 27, 2026 at 7:09 am #70880
      Paul Cannon
      Participant

        I’m still learning these but it looks much more like Wahlenbergiella striatula to me. That has been recorded from the Yorkshire coasts.

        Best wishes

        Paul

        September 27, 2026 at 11:20 am #70892
        kianhaylescotton
        Participant

          Cheers Paul, that looks like a better fit.
          Many thanks,

          Kian

          October 2, 2026 at 9:52 am #70923
          Alain GERAULT
          Participant

            Certainly Wahlenbergiella striatula

            Alain GERAULT Lichensmaritimes.org

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