Observation 204628: Bacidina egenuloidea (Fink) S. Ekman


Copyright © 2015 Jason Hollinger (jason)
Copyright © 2015 Jason Hollinger (jason)

Proposed Names

2% (2)
Recognized by sight
18% (2)
Based on chemical features: UV+ white, K- C- KC- P-
23% (1)
Recognized by sight: shiny black & brown convex apothecia; grey/brown goniocysts
Based on microscopic features: Spores acicular, 20+x2, 3-5 septate; dark blue-green epithecium, colorless hypothecium, asci clavate, tholus thick

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
stay tuned
By: Jim Bennett (Lichenman)
2017-02-17 11:20:21 PST (-0800)

More work on this done today. It might be Scoliciosporum umbrinum but more work is needed.

Apparently there are three species here
By: Jason Hollinger (jason)
2017-02-16 15:47:15 PST (-0800)

1: Bacidina egenuloidea – Unfortunately no good photos, but such an interesting record, it seems worth preserving this, the original, post.

2: Scoliciosporum umbrinum – Less interesting (although probably much overlooked), with fairly complete photographic documentation and lab notes, so worth posting.

3: random “not Fuscidea” sterile crust – The primary thing in your photos, in my two close-ups that are already up, and full spot tests documented. Clearly worth posting, as well, even if it doesn’t have a name yet.

I’d be happy to move photos around, but this is your observation, so you should probably be the one to create the new observations.

I don’t mind, but what would be the second one? What can I do to help on my end?
By: Andrew Khitsun (Andrew)
2017-02-16 14:37:33 PST (-0800)
I don’t have it
By: Jason Hollinger (jason)
2017-02-16 11:52:13 PST (-0800)

All I have on mine is Scoliciosporum umbrinum, with those nifty coiled acicular spores. Too bad, I was hoping to get some good macro and micro shots of this rare thing…

Andrew, would you mind splitting this observation into three pieces? We can move my close-ups of the sterile crust into one, and I can post the photos I just took of the Scoliciosporum in the third.

Thank you, Jim
By: Jason Hollinger (jason)
2017-02-16 10:05:28 PST (-0800)

I will look for the Bacidina on the fragments Andrew sent me and see if I can add a close-up photo of it.

identification explanation
By: Jim Bennett (Lichenman)
2017-02-16 09:49:13 PST (-0800)

The Bacidina thalli are NOT the pale colored circular crusts, but instead are almost invisible in the dark areas around these. In the scope the black/brown shiny convex apothecia of Bacidina are very abundant, but they don’t show up in these images. I’ll take pictures of them in my scope. This species was collected at the exact same locality by Thomson in 1973, so it is not a new state record. I am wondering why it’s not been found anywhere else. The only other known locality for the species is in Ohio and it was describe by Fink.
The pale circular, sorediate crusts are sterile and cannot be identified, and are definitely not Fuscidea. Probably another mystery Lepraria needing TLC for identification.

Sorry, some confusion with specimen numbers
By: Jason Hollinger (jason)
2017-02-15 10:06:21 PST (-0800)
doubtful ID
By: Jim Bennett (Lichenman)
2017-02-15 08:11:56 PST (-0800)

The images don’t fit F. recensa at all, but I’d like to see the specimen. I’m working on 3 other Fuscidea specimens from WI right now.

Well, I could be totally wrong
By: Jason Hollinger (jason)
2016-01-16 22:59:34 PST (-0800)

It’s very easy to come up with completely incorrect ids using James’s keys — there’s rarely much in the way of verifying details. I’ll be sure to run it by him some day.

Thomson doen’t have this genus at all, Bennett only has Fuscidea pusilla :(
By: Andrew Khitsun (Andrew)
2016-01-16 22:47:34 PST (-0800)
Added two close-up photos
By: Jason Hollinger (jason)
2016-01-16 21:45:02 PST (-0800)

The K reaction is just from the K dissolving the thallus, probably. I got only a UV reaction: K- C- KC- P- UV+ bright white. Using Lendemer’s key to sterile crusts of North America this comes out as either Fuscidea recensa or F. applachensis. The former is much more common on CNALH, if that’s to be trusted. It resembles the photo Lendemer included well enough to be plausible.

Jason, this is #5132015-2
By: Andrew Khitsun (Andrew)
2016-01-16 21:23:40 PST (-0800)
On sandstone in shade
By: Andrew Khitsun (Andrew)
2015-05-20 17:20:33 PDT (-0700)

Thallus white or off-white (when viewed under microscope), but appearing gray overall, covered by soredia in places. Responds to K with some greening-browning. Doesn’t seem to respond to KC or C.

Created: 2015-05-20 17:03:50 PDT (-0700)
Last modified: 2017-02-17 11:19:13 PST (-0800)
Viewed: 153 times, last viewed: 2017-02-19 19:19:10 PST (-0800)
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