Observation 75474: Diploschistes muscorum (Scop.) R. Sant.
When: 2011-08-25
Who: zaca
No herbarium specimen

Notes: Either in C as well as in KC, there was a flash red reaction that is not documented.
All the mature asci observed (and they were many) had 4 spores inside.
Average dimensions of the spores:
Me = 27.06 × 11.44 ; Qe = 2.4 (N=45).

Proposed Names

47% (2)
Eye3 Eyes3
Used references: CNALH.
Based on microscopic features
Based on chemical features
12% (2)
Recognized by sight: on bare rock? or at least hard-packed soil
Based on chemical features: K-

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Your vote wins, because you’re the observer
By: Jason Hollinger (jason)
2011-09-05 15:48:32 CDT (-0500)

I just wanted to register my dissent. :) You make good points, backed up very well with good data and photographic evidence. I readily grant that you could be right.

This time I can not agree with you,
By: zaca
2011-09-05 15:38:26 CDT (-0500)

because:
– The specimen growing in soil in the barrier on the sides of a road. I did not mention the subtract, thinking that this was clearly visible in the photographs;
– As you can see in the photos this is a very old specimen, whose thallus is already in the process of disintegration. Therefore, any hint of relation to the genus Cladonia in the past may no longer be visible for a long time;
– The chemical reaction is so strange to the species D. muscorum as for the species D. scruposus, which I already met several times in the past and from which I made microscopy; In my view, what is observed in the reaction K is dark-purple, plus some yellow tones;
– I am not one who makes the chemical characters ahead of microscopic characters. This time the preparation was particularly good and were powerless to observe numerous asci whose content was visible, which I think is well documented in photographs of this observation. Of all of those I counted four spores inside. It happened to me have found asci with four spores in D. scruposus, but right next to others with a higher number, more often 8. Now, all four spores is difficult in any other species beyond D. muscorum, as I learned from the descriptions in “CNALH”.

D. muscorum starts as parasite on Cladonia
By: Jason Hollinger (jason)
2011-09-05 14:14:06 CDT (-0500)

No matter how I try to interpret this observation, something doesn’t fit.

D. muscorum: should be on moss or soil among Cladonia, should be K+y/r
D. diacapsis: should have some 8-spored asci, should be K+y/r
D. scruposus: should be 8-spored (but 4-spored is listed as possible)

I would lean toward D. scruposus despite the 4-spored asci, because of the substrate and K- reaction.

(I personally detest spore number as a character. Pertusaria relies heavily on it, too, and 50%+ of the time I undercount. I really wish I knew what I’m doing wrong. In any case, it is completely within my experience for supposedly 8-spored species to apparently only have 4-spored asci.)

Created: 2011-09-05 13:36:15 CDT (-0500)
Last modified: 2011-09-05 15:38:51 CDT (-0500)
Viewed: 74 times, last viewed: 2016-08-07 08:28:44 CDT (-0500)
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