Observation 164390: Pertusaria werneriana Boqueras
When: 2014-03-25
Collection location: Sintra, Portugal [Click for map]
Who: zaca
No herbarium specimen

Notes: This a new addition to my Pertusaria spp. observed. Its identification was only possible due to the recently found reference (see below). It is a corticolous species with a Mediterranean distribution and is found on young branches of trees (e.g. Olea europaea, Quercus ilex, Q. suber, Opuntia sp., etc), in warm and sunny habitats. This species was proposed and described in that reference. It doesn´t appear in the portuguese checlist, but one of the specimens examined in the reference was from Portugal.
I would say that in this case the identificaton is a perfect match with the data given in the reference for Pertusaria werneriana. In addition to the data in the photos attached, I obtained the following average values for the dimensions of the spores:
Me = 52.6 × 26.3 um ; Qe = 2 (N=25).
For a better comparison, I reproduce the discription of this species from the reference:
“Thallus cracked and areolate at the centre and continuous at the margin, somewhat verrucose, pale grey-greenish or yellow-gree, lacking soredia and isidia. APothecia verruciform, dispersed or grouped, 1-2 mm in diam., not constricted at the base. Ostiole punctiform, pale, 1-2 per verruca. Ascospores 8 per ascus, uniseriate, ellipsoide, colourless, 45-58 × 25-30 um, double and smooth wall. CHEMISTRY: thallus K+ pale yellow, C-, KC-, P-. Coronaton, 2’-O-methylperlatolic acid and confluentic acid.”


Chemical reactions;
Apothecial section;
Another specimen on the same tree.
Spores [Average dimensions: Me = 52.6 × 26.3 um ; Qe = 2 (N=25)];

Proposed Names

86% (1)
Eye3 Eyes3
Used references: M. Boqueras and X. Llimona, The genus Pertusaria (Lichenised Ascomycotina) On The Iberian Peninsula and Balearic Islands. I. Subgenus Pertusaria, Mycotaxon 88, 471-492.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2014-04-29 12:56:14 PDT (-0700)
Last modified: 2014-04-29 12:59:18 PDT (-0700)
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