Observation 21393: Pannaria rubiginosa (Ach.) Bory
When: 2009-05-13
No herbarium specimen

Notes: Characterization: corticolous foliose lichen with
(1) prominent black hypothallus composed of dense, felt-like black hyphae bordering much of the perimeter of the thallus,
(2) light gray thallus with abundant orangish brown apothecia
(3) no soredia or isidia
(4) small lobules frequent along lobe margins

Proposed Names

0% (2)
Eye3
Used references: Brodo, et al., 2001, pp.161-162; Hinds and Hinds, 2007, p.123
92% (2)
Eye3 Eyes3
Recognized by sight
Used references: Trevor Goward agrees. He says it is too blue to have atranorin, and the lobes are too “squamulose” to be Anzia. (Haha, and he’s seen both species in question. :)

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Pannaria rubiginosa, indeed!
By: Chris Parrish (kitparrish)
2009-05-29 18:16:13 PDT (-0700)

Thank you, Jason! This one has been a mystery for me ever since finding it. I didn’t realize that Pannaria could have a great black felt-like hypothallus. All of today’s talk about lichenicolous fungi made me go back and look at this photo again. It certainly does seem to be very close to the photo of Pannaria rubiginosa on p.478 of Brodo. As you point out, the lobe shapes of Anzia and Pannaria rubiginosa are quite different, and this one matches Pannaria. Now I have to figure out how to manipulate the MO identification scores to make Pannaria rubiginosa go to the top.

My instinct says Pannaria
By: Jason Hollinger (jason)
2009-05-29 17:56:12 PDT (-0700)

I’ve seen lots of Pannaria that had that voluminous black hypothallus. But those were in Chile, not Quebec. I’ve never seen Anzia… but I have seen the very closely-related Protopannaria (again in Chile). Also look at figure 6g,h in Lichens of North America — I believe that in Anzia the hypothallus does not project beyond the edges, so that it is not visible from above. Whereas Pannaria very much does, sometimes several mm beyond the edge.

But there’s a very simple test if you happen to see it again… Pannaria has cyanobacteria and is K-; Anzia has green algae and is K+ yellow (atranorin in the cortex). (And the spores would be totally different; they are different families, after all.)

[Oops, sorry, I was thinking AnaptychiaAnzia is in the same family as Pannaria, with similar spores.]

Created: 2009-05-29 17:26:27 PDT (-0700)
Last modified: 2009-05-29 17:26:27 PDT (-0700)
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