When: 2011-06-13

Collection location: Matinha de Queluz, Sintra, Portugal [Click for map]

Who: zaca

No specimen available

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.


Apothecial section.
2 Asci with 8 spores each.
Isolated spores.

Proposed Names

58% (1)
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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= Observer’s choice
= Current consensus


Add Comment
Nice spores!! :)
By: Jason Hollinger (jason)
2011-06-15 17:21:59 CEST (+0200)