When: 2014-03-25

Collection location: Sintra, Portugal [Click for map]

Who: zaca

No specimen available

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

87% (1)
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.

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
No one has commented yet.

Created: 2014-04-29 15:56:14 CDT (-0400)
Last modified: 2014-04-29 15:59:18 CDT (-0400)
Viewed: 47 times, last viewed: 2019-09-25 14:34:24 CDT (-0400)
Show Log