Observation 159439: Acarospora A. Massal.

When: 2013-07-29

Collection location: Door Bluff Headlands County Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available


Proposed Names

57% (1)
Recognized by sight
29% (1)
Used references: ID provided by Jim Bennett. ID is not precise (different specimen used)

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= Observer’s choice
= Current consensus


Add Comment
Well, I can help slightly
By: Jason Hollinger (jason)
2015-07-14 00:27:55 EDT (-0400)

A. americana was reinstated by Knudsen in 2011, some four years after he synonymized it with A. veronensis in the Sonoran Flora. And while it is primarily on granitic and volcanic rocks, it has also been collected on limestone, wood, etc.

Here’s the key paper. Enjoy!

Another interesting aspect is a substrate:
By: Andrew Khitsun (Andrew)
2015-07-13 22:26:43 EDT (-0400)

Thomson says A.americana is on granitic rocks, especially glacial boulders. Sonoran Flora mentions A.veronensis growing on acidic rocks and basalt and sometimes wood. In this case, it’s dolomite – sounds like an unsuitable substrate for acid-loving lichen.

This ID should be taken with a grain of salt.
By: Andrew Khitsun (Andrew)
2014-11-08 23:32:48 EST (-0500)

I collected whole bunch of dolomite chips out there with a menagerie of lichen on them. This particular specimen was on the wall of a large dolomite boulder and was not collected. But of those collected, all the specimen that look black were identified by J.Bennett as being A.americana. But here is where a bigger confusion starts: when I created ID A.americana, MO insisted the name was deprecated and wanted to name it A.veronensis. But just few minutes ago I worked on specimen of A.cinereoalba which was allegedly renamed A.veronensis too. But that species has completely different look! What’s going on here? Are we renaming all of the Acarospora into A.veronensis these days just for the good measure?

Can’t quite zoom in enough
By: Jason Hollinger (jason)
2014-02-10 12:32:37 EST (-0500)

but could this also be Staurothele or Verrucaria?

The pink background is the same stuff as in observation 159213
By: Andrew Khitsun (Andrew)
2014-02-09 23:53:01 EST (-0500)