Observation 69283: Pertusaria hymenea (Ach.) Schaerer
When: 2011-06-13
Who: zaca
No herbarium specimen

Notes: This time I decided to use A Preliminary World-wide Key to the Lichen Genus Pertusaria, which pretends to be a world-wide key for this genus and includes more than 700 species. This key as several sub-keys according to: the presence/absence of apothecia, the macro feature disciform/verruciforme of apothecia, the habitat rock/bark, and the number of spores per ascus. The obvious choice (after microscopy) of the sub-key
Group 20. Apothecia present, disciform; ascospores 8 per ascus, on wood gives immediately Pertusaria hymenea, since is the only one in this group with the dimension of spores compactible with the values observed:
(72.7) 74.2 – 82.8 (87.6) x (29.7) 32.3 – 35.3 (35.6) µm
Q = 2.2 – 2.5 (2.7) ; N = 10
Me = 78.5 × 33.4 µm ; Qe = 2.4.

Images

151440
151441
Apothecial section.
151442
Asci.
151443
2 Asci with 8 spores each.
151444
Isolated spores.

Proposed Names

58% (1)
Eye3 Eyes3
Used references: See the Notes.
Based on microscopic features: See attached photos.
Based on chemical features: C-, K+y, KC+y

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Nice spores!! :)
By: Jason Hollinger (jason)
2011-06-15 08:21:59 PDT (-0700)

Created: 2011-06-15 07:46:55 PDT (-0700)
Last modified: 2011-06-15 07:46:56 PDT (-0700)
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