Observation 157161: Halecania pepegospora (H. Magn.) van den Boom

When: 2013-05-20

Collection location: Yellowstone Lake State Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

Images

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Proposed Names

-13% (2)
Recognized by sight
-56% (1)
Recognized by sight
61% (2)
Eye3
Based on microscopic features: spores 1-septate, hyaline, 8 per ascus, ~11-14×3-5µm; abundant algae in amphithecium; cortex distinct, up to 40µm thick below apothecium rim
Based on chemical features: on HCl+ substrate; all spot tests negative; no granules or very weakly granular amphithecium and no granules in hymenium
47% (2)
Eye3
Recognized by sight: (see comments)
68% (2)
Eye3 Eyes3
Used references: Brodo 2016 (new keys); McCune 2017
Based on microscopic features: Spores 14×3-4, 1-septate, hyaline, halonate, ellipsoid, 1 end sometimes tapered; thallus esorediate; hypothecium white; thallus grey-white; apo margin lecanorine
Based on chemical features: Thallus & med K-

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
That would explain why I was struggling with this so much
By: Jason Hollinger (jason)
2018-03-20 11:59:34 PDT (-0700)

I don’t think I ever considered Halecania. I’ve only ever seen that genus once. And I still have a duplicate of this specimen with me. Can’t wait to look at it again. Thanks for identifying this, Jim!

new WI species
By: Jim Bennett (Lichenman)
2018-03-20 11:55:16 PDT (-0700)

This is a new state record.

Can’t rule out L. erysibe for sure
By: Jason Hollinger (jason)
2014-05-25 00:47:57 PDT (-0700)

Both L. cyrtella and L. dubitans are on bark. Both L. fuscella and L. nylanderiana have 3-septate spores. So those can all be ruled out easily. L. erysibe has blastidiate margins, but according to the British Flora, the blastidia can be very sparse and in those cases can be very similar to L. inundata.

Only 5 species of Lecania were listed for WI until now (according to Thomson & Bennett).
By: Andrew Khitsun (Andrew)
2014-05-24 17:59:41 PDT (-0700)

L.Cyrtella, L.dubitans (dimera), L.erysibe, L.fuscella (syringea), L.nylanderiana

Jason Identified this as Lecania
By: Andrew Khitsun (Andrew)
2014-05-23 20:39:20 PDT (-0700)
Shoot
By: Jason Hollinger (jason)
2014-02-05 17:50:44 PST (-0800)

Might try it anyway, look for tell-tale black streaks in the hymenium, might still be visible if you have sharp eyes… Who knows!

Can’t do:
By: Andrew Khitsun (Andrew)
2014-02-05 15:46:58 PST (-0800)

my microscope is only 2x-4x :-(

Could go either way, but would guess Lecanora before Rinodina
By: Jason Hollinger (jason)
2014-02-05 15:16:45 PST (-0800)

You can actually see the color of the spores pretty easily under a dissecting microscope. If you have a nice clean razor blade, just cut one of the apothecia vertically and look at it under 20x or more. Rinodina (and Buellia and many Rhizocarpon) will have clearly visible black specks like pepper against the pale-colored interior. Some things look pure black, like Lecidea, but they mostly have colorless spores. Anyway, it’s a quick way to give a good guess to the genus of a number of crusts.

Created: 2014-01-04 22:19:51 PST (-0800)
Last modified: 2018-04-09 19:16:07 PDT (-0700)
Viewed: 78 times, last viewed: 2018-08-20 05:52:30 PDT (-0700)
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