Observation 185404: Sarcogyne similis H. Magn.

When: 2014-09-11

Collection location: Petenwell Rock, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available


Copyright © 2015 Jason Hollinger (jason)
spores in water

Proposed Names

2% (2)
Recognized by sight
2% (2)
Used references: Jason Hollinger ID
61% (2)
Eye3 Eyes3
Used references: ID provided by Jason Hollinger
Based on microscopic features: HCl-; disks black even wet; rims black, smooth, entire; epihymenium brown; hymenium clear, ~130um, I+r; hypothecium hyaline; exciple black outside, brown inside; hypothecium hyaline; spores many, narrowly oblong, ~3-6×1.5-2um.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Okay, I get it
By: Jason Hollinger (jason)
2017-03-19 20:56:58 SAST (+0200)

Ignore Polysporina for the moment since there is absolutely no sign of carbonized tissue on top of the hymenium, we really only have two options in North America, S. similis (disks black to red-black when wet), and S. hypophaea = S. privigna (disks red to red-brown esp. when wet). They are also supposed to differ in the degree of carbonization of the outer exciple, but that’s such a vague and overlapping character as to be seemingly useless in a single case. (It might be useful when separating out the two taxa and proving that there really are multiple correlated characters, though.)

I’m going with the pitch-black (even when wet) apothecia. I think this should be S. similis not S. hypophaea.

By: Andrew Khitsun (Andrew)
2017-03-18 03:02:26 SAST (+0200)
Oh geez, you’re pitting me against myself now!
By: Jason Hollinger (jason)
2017-03-18 02:55:42 SAST (+0200)

I didn’t even consider Polysporina this time around…

Tough group!
By: Jason Hollinger (jason)
2016-01-26 05:08:50 SAST (+0200)

Yeah, I think I didn’t remember that some Sarcogyne have carbonized margins when I wrote my comment below. Sonoran Flora covers most of the species, at least the common widespread ones, so it should be a good reference.

Scrap that – I guess it’s supposed to have cracked rim?
By: Andrew Khitsun (Andrew)
2016-01-26 03:07:57 SAST (+0200)

On the other hand, I am reading that S.regularis can be carbonized too – the only one non-carbonized is S. privigna. I am reading mostly from CNALH, where the info comes from Sonoran Flora, it seems.

Sarcogyne clavus is said to be carbonised?
By: Andrew Khitsun (Andrew)
2016-01-26 02:52:39 SAST (+0200)

For some reason I never see that species being discussed. This particular specimen I’d rule out S.privigna just because apothecia are bigger here. But don’t know anything about S.clavus

Not very confident…
By: Jason Hollinger (jason)
2015-01-25 17:51:56 SAST (+0200)

Polysporina is first and foremost defined by roughened umbonate or gyrose apothecia… this clearly has smooth round apothecia. But in section, I find the exciple to be fully carbonized and the epihymenium to be very dark, too. (Hymenium ~120µm deep; spores many per ascus, ~4-5×2-2.5µm.) The carbonized exciple should rule out Sarcogyne, perhaps more reliably than the lack of textured apothecia would otherwise rule out Polysporina.

Created: 2014-10-25 01:15:46 SAST (+0200)
Last modified: 2017-03-19 20:52:49 SAST (+0200)
Viewed: 132 times, last viewed: 2017-06-19 11:20:32 SAST (+0200)
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