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Observation 234778: Lichen P. Micheli

Is the black one around the outside Peccania? I see Peccania texana listed for DV but can’t really find any info on it.


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I agree, make this obs about the brown thing
By: Jason Hollinger (jason)
2016-03-16 20:43:02 MDT (-0600)
We already have the second specimen here
By: James Bailey (Silversea_Starsong)
2016-03-16 20:36:48 MDT (-0600)

down as Aspicillia cf. boykinii. So I guess this one can be dedicated to the brown species.

I’d say mixed collection
By: J-Dar
2016-03-16 20:32:21 MDT (-0600)

And defer to Jason for the Aspicilia ID and parasitic secondary species.

Okay, it’s official, I was completely wrong!
By: Jason Hollinger (jason)
2016-03-16 13:49:47 MDT (-0600)

Definitely not Squamarina. I’m now thinking it’s Aspicilia boykinii (or A. determinata) again like you say. I wonder if the tan stuff is a species of Acarospora? A. succedens = A. nashii is a parasitic brown Acarospora not altogether unlike this, but reported growing on Dimelaena oreina. Under the notes of that species in Sonoran Flora, Kerry mentions that A. dispersa, A. interspersa and A. obnubila can also grow on other lichens (but are not obligate parasites). It’s at least possible…

I thought it was a weird form of that Aspicillia
By: James Bailey (Silversea_Starsong)
2016-03-16 13:20:10 MDT (-0600)

see new photo, a similar brown part is happening on a lichen you already identified for me as Aspicillia…thanks for checking it out zaca!

It is a possibility,
By: zaca
2016-03-16 13:10:13 MDT (-0600)

I interpreted the tan things like the inflated central thallus that lost pruina for some reason, but it can be anything else. This looks weird anyway.

A thought…
By: Jason Hollinger (jason)
2016-03-16 12:14:52 MDT (-0600)

Is there any possibility the tan things are a parasite? I’m concerned because there appear to be two vastly different types of apothecia on this thing: Acarospora-like or Aspicilia-like, immersed, dark gray, pruinose things around the margin; and convex, rimless, epruinose, beige, irregular things in the center.

Woah, Acarospora?
By: Jason Hollinger (jason)
2016-03-16 12:12:20 MDT (-0600)

That would be a fun find! I’m not familiar with any Acarospora like that.

Thanks for looking at it, Zaca. I’ve only seen Squamarina once or twice (one observation from 2006, long before I knew what I was doing!), so I have no idea what it’s typical appearance or habits are.

Certainly …
By: zaca
2016-03-16 04:52:57 MDT (-0600)

this is very close to S. lentigera, but doesn’t seem like one to me; The lobes are too fat and wide and not wavy as in S. lentigera and the immersed apothecia seem wrong. But I have a limited experience on this species. On the other hand, there are some Acarospora with similar appearance, like A placodiiformis and maybe some others, that should be consider.

We have to defer to Zaca on this
By: Jason Hollinger (jason)
2016-03-15 18:23:44 MDT (-0600)

He’s the clear expert on Squamarina. There are members of the Lecanora muralis group which we might consider, too.