Observation 214023: Lecidella Körber
When: 2015-08-18
Who: zaca
No herbarium specimen

Notes: Growing on bark.
Chemistry: C-, K-, KC- (maybe there was a pale yellow reaction with K and KC, but weak).

Images

550444
550445
551763
Microscopy: Sections;
551764
Microscopy: Asci and spores.
611888
New microscopy: Asci and spores (in water after pretreatment with KOH);
611889
New microscopy: Asci staining in IKI (after pretreatment with KOH);

Proposed Names

29% (1)
Recognized by sight
86% (1)
Eye3 Eyes3
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Definitely Lecidella!
By: zaca
2016-04-15 14:29:57 EDT (-0400)

I returned to this observation with the main target to observe the asci-type with the help of lugol; Meanwhile I also observed the asci in water, after a pretreatment in KOH for some minutes. I uploaded new photos and it is now clear that the asci are of Lecanora-type, which means that this specimen belongs to the genus Lecidella. It could also belong to the genus Lecidea, in which case the asci will be of Lecidea-type, though there are few species in this genus growing on bark, one of which (Lecidea exigua) is macroscopically similar to this specimen.

Microscopy added; I’m stumped!
By: zaca
2015-08-30 07:29:31 EDT (-0400)

The microscopy revealed something close to Lecidella type, but I was not able the classify it.
In fact, looking to the British Flora, didn’t find any species in that genus with such features.
The spores are simple, hialine, guttulate (mostly with two big drops) with the following dimensions:
(11.9) 13.8 – 16.1 (18.8) x (6.5) 7.1 – 8.7 (9) µm
Q = (1.6) 1.63 – 2.2 (2.3) ; N = 30; Me = 15 × 7.9 µm ; Qe = 1.9 .

Created: 2015-08-25 13:45:13 EDT (-0400)
Last modified: 2016-04-15 14:20:55 EDT (-0400)
Viewed: 35 times, last viewed: 2016-10-28 03:52:24 EDT (-0400)
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