Ginny B's picture

Thalidium sp

Observed: 25th May 2012 By: Ginny B
S159 Neighbourhood Nature - course complete
Ginny B’s reputation in Fungi and LichensGinny B’s reputation in Fungi and LichensGinny B’s reputation in Fungi and Lichens
Thalidium sp
Description:

White crustose lichen with quite large black pimples.

Identifications

Caution: Do NOT use iSpot to identify fungi to eat!

Some fungi are very poisonous so a mistaken ID could have serious consequences.

  • Thalidium papalare
    Confidence: It might be this.
  •  
    Likely ID
    Porpidia sp.
    Confidence: It's likely to be this, but I can't be certain.
Species interactions

No interactions present.

Comments

synan's picture

Thelidium papulare

The black discs here seem to have a proper margin, making them apothecia. Thelidium papulare (note the correct spelling) has dome-like perithecia with an opening (ostiole) at the top, visible here:

http://www.britishlichens.co.uk/species/Thelidium%20papulare%20large.jpg

This might be a Porpidia sp., but a look at the spores under a microscope is probably necessary.

Nigel

Ginny B's picture

Thanks, Nigel

Thanks, Nigel - correct spelling noted!

The perithecia was certainly very dome-like. I wasn't aware of an ostiole on the top but will have another look.

I don't own a microscope more's the pity, the best I can do is a magnifying glass, but that's probably not enough.

Ginny

AlanS's picture

I agree

I agree with Nigel that this is most likely a Porpidia species, but most need microscopic examination and chemical testing.

Pretty good lichenologists confidently name many of them in the field. Very good lichenologists don't!

Since I am not a very good lichenologist yet (and a long way to go), I'll suggest this is Porpidia macrocarpa, but this is merely a suggestion.

Alan